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11-11-2016, 04:48 PM
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#1
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Senior Member
Join Date: Jan 2015
Location: Massachusetts
Posts: 138
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Anyone else get 'diesel dots'?
In the last few years I've noticed that I get little tiny oily dots on my motorhome, primarily on the driver's side and mostly towards the rear. Sometimes there are more than a hundred dots when I return from a trip. With a little time, they get hard and pluck off with a finger nail. The more recently I've polished the motorhome, the easier they come off. But it takes a lot of time to clean them up.
I've been driving motorhomes for more than 15 years and have only recently noticed this. I'm thinking it's from the vertical exhaust of diesel trucks that are usually passing me (speed limited by toad) hence the driver's side getting the worst of this.
Anyone else? Ideas on where it comes from? Cleanup? -thanks
__________________
2015 FR3 30DS
2010 Ford Escape Toad -or- 2012 Ford Focus Toad
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11-11-2016, 05:57 PM
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#2
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Senior Member
Join Date: Apr 2016
Posts: 137
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Spots...
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2017 Rockwood 2304KS
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11-12-2016, 07:50 AM
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#3
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Senior Member
Join Date: Mar 2016
Posts: 175
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If it is artillery fungus it is a pain in the butt to clean off. It usually lives in mulch that hasn't been replaced for a while. We had it on our siding of her house. Pressure washer with the nozzle 2 inches away from it doesn't get it off.
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11-12-2016, 08:12 AM
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#4
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Senior Member
Join Date: Sep 2016
Location: SE Michigan
Posts: 2,024
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Sounds like fly poop to me.....
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11-12-2016, 09:26 AM
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#5
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Senior Member
Join Date: Mar 2014
Posts: 1,748
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This thread is ripe for constuctive comments. :-) I like the mulch one so far. But, if the OP only has them on the front of his unit, then diesel dots gets my vote. Unless, the mulch spores are target specific......
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11-12-2016, 10:31 AM
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#6
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Senior Member
Join Date: Jun 2012
Posts: 10,907
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Quote:
Originally Posted by Still Kickin
This thread is ripe for constuctive comments. :-) I like the mulch one so far. But, if the OP only has them on the front of his unit, then diesel dots gets my vote. Unless, the mulch spores are target specific......
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What if he's parking it next to a mulch bed on his drivers side rear???
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1988 Coleman Sequoia - popup (1987-2009) - outlasted 3 Dodge Grand Caravans!
2012 Roo19 - hybrid (2012-2015)
2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado 1500 Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10
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11-12-2016, 10:37 AM
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#7
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Senior Member
Join Date: Jan 2015
Location: Massachusetts
Posts: 138
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Thanks pppitiful for the picture. I should have done the same but thought of posting only after I cleaned off the current batch. Yes, the dots look like pppitiful's picture. And, yes, some of the dots appear on the front and some wind around to the back. It's not likely fungus.
I'd appreciate keeping responses on topic. -thanks
__________________
2015 FR3 30DS
2010 Ford Escape Toad -or- 2012 Ford Focus Toad
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11-12-2016, 10:58 AM
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#8
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Senior Member
Join Date: Jun 2012
Posts: 10,907
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Quote:
Originally Posted by Kadiddle
I'd appreciate keeping responses on topic. -thanks
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So which ones do you think are off-topic?
__________________
1988 Coleman Sequoia - popup (1987-2009) - outlasted 3 Dodge Grand Caravans!
2012 Roo19 - hybrid (2012-2015)
2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado 1500 Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10
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11-12-2016, 11:13 AM
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#9
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Senior Member
Join Date: Jan 2015
Location: Massachusetts
Posts: 138
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Quote:
Originally Posted by rockfordroo
So which ones do you think are off-topic?
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I thought fly poop was pretty much in the wrong direction. Unlikely given the circumstances. Sorry if I've offended anyone that is trying to help.
__________________
2015 FR3 30DS
2010 Ford Escape Toad -or- 2012 Ford Focus Toad
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11-12-2016, 11:22 AM
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#10
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Senior Member
Join Date: Jun 2012
Location: Southern NM
Posts: 9,561
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Interesting problem. I can't see how it would be semi exhaust. We travel frequently on I-10 between NM and Phoenix which is pretty much one long line of semis. We get passed often as we usually drive 65. No spots on our rig at all, except for bug guts . The artillery fungus is interesting..... Never heard of that before. Learn something every day.
Good luck in finding the culprit!
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Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD Duramax
Reese Fifth Airborne Sidewinder
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11-12-2016, 11:25 AM
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#11
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Senior Member
Join Date: Jan 2013
Location: Space Coast of Florida
Posts: 4,022
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Quote:
Originally Posted by Kadiddle
Thanks pppitiful for the picture. I should have done the same but thought of posting only after I cleaned off the current batch. Yes, the dots look like pppitiful's picture. And, yes, some of the dots appear on the front and some wind around to the back. It's not likely fungus.
I'd appreciate keeping responses on topic. -thanks
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So why do you reject the fungus? Could be coming from where you park your unit.
I think if it was from passing diesel trucks we all would have experienced it at some time in our life and there would be a cleaner advertised on TV for it. I just can't buy the passing diesel truck theory.. Fungus from where you store your RV is plausible but then again I don't know where you store or park your RV.
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2016 Siverback 33IK, Towed 50K+ mile
2018 Ford F-350 Lariat 6.7L V8 Diesel 4WD Crew Cab
"If you don't know where you are going, any road will get you there."
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11-12-2016, 01:46 PM
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#12
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2007 WildCat 32QBBS
Join Date: Jul 2011
Location: NJ
Posts: 2,349
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I had this on the driver's side on our 5er. I scraped most off with my thumb nail. Truck exhaust, I'm saying no. The article or blog posted earlier is a match as far as I'm concerned. I might of picked them up in a campground, I don't know. But they haven't been back in over a year and a half.
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*Current: 2005 Ford F350 Crew Cab Dually 6.0 diesel 4x4*
*Retired: 1987 F350 Crew Cab Dually 6.9 turbo diesel
2007 Forest River WildCat 32QBBS
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11-12-2016, 02:05 PM
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#13
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Senior Member
Join Date: Feb 2013
Location: Pfafftown NC
Posts: 2,353
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It's the fungus, believe me. Been there, done that! Can be random and come from any place you park. Even for a short time. If it was anything to do with diesel it would not get that hard.
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There are 10 types of people in the world.
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2013:31 / 2014:51 / 2015:58 / 2016:37 / 2017:46
2018:16
Total 239
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11-12-2016, 02:21 PM
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#14
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Moderator Emeritus
Join Date: Dec 2012
Location: North Carolina
Posts: 11,069
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Very interesting. I get marroon/rust colored spots on my rig. More noticeable on our old white tt then our current tan fiver but very difficult to get off. Always thought it was some bug or berry thing. Artillery fungus is interesting as we do have mulch at the house and many CG's have mulch.
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2014 Crew Cab Chevy Silverado 3500 4wd Duramax/Allison
2014 Sabre 34REQS-6
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11-12-2016, 03:39 PM
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#15
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Senior Member
Join Date: Feb 2013
Location: Pfafftown NC
Posts: 2,353
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About 10 years ago I was noticing this spotting on our cars. The wife who has an landscaping/horticultural degree said it's sap from the trees. I dismissed it but after washing our cars noticed it was mostly on the sides and not the top surfaces. Google came up with the answer. Many others have had these problems for a long time. Nothing new. Nature is quite inventive, isn't it.
__________________
There are 10 types of people in the world.
Those that know binary, and those that don't.
2013:31 / 2014:51 / 2015:58 / 2016:37 / 2017:46
2018:16
Total 239
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11-12-2016, 04:29 PM
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#16
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Senior Member
Join Date: Jul 2013
Location: Franklin, TN
Posts: 746
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Get spots like mentioned when traveling over newly paved or resurfaced roads. Figured tv was kicking it up on the. Plenty of that going on now to beat the cold weather. Seems to be mostly from the oil they used to prime to road surface. The spots I get are easy to removed using a liquid bug and tar remover. Test a small spot first, worked great on fiberglass of Flagstaff tt. I do a small area and imediately wash it good wth rv soap and water.
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11-12-2016, 04:29 PM
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#17
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Senior Member
Join Date: Jan 2015
Location: Massachusetts
Posts: 138
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Thank you all for the responses. Interesting potential causes including the fungus. With several posts regarding fungus, it's hard to dismiss. For me, I always notice this right after a trip. Once cleaned, does not re-appear until the next trip. This leads me to believe it's happening while traveling. Where I park is my very open back yard but the driver side is near an untreated wood fence. The substance does seem oily/greasy again pointing to some sort of road grime.
I'll be moving to a brand new home over the winter where I have a dedicated asphalt pad for the motorhome. If it goes away there, credence will be given to the fungus and/or where I park theories.
__________________
2015 FR3 30DS
2010 Ford Escape Toad -or- 2012 Ford Focus Toad
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11-12-2016, 05:35 PM
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#18
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Senior Member
Join Date: Jan 2013
Location: Space Coast of Florida
Posts: 4,022
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Quote:
Originally Posted by Kadiddle
Thank you all for the responses. Interesting potential causes including the fungus. With several posts regarding fungus, it's hard to dismiss. For me, I always notice this right after a trip. Once cleaned, does not re-appear until the next trip. This leads me to believe it's happening while traveling. Where I park is my very open back yard but the driver side is near an untreated wood fence. The substance does seem oily/greasy again pointing to some sort of road grime.
I'll be moving to a brand new home over the winter where I have a dedicated asphalt pad for the motorhome. If it goes away there, credence will be given to the fungus and/or where I park theories.
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Well your mind is pretty made up about road grime. I would suggest you check your RV every time you stop to see if you can determine what passed you or what type road you were on. Personally, only time I've picked up bad road grime is when there is road construction and that is pretty much a constant if,on the Interstate.. Good luck on nailing it down...
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2016 Siverback 33IK, Towed 50K+ mile
2018 Ford F-350 Lariat 6.7L V8 Diesel 4WD Crew Cab
"If you don't know where you are going, any road will get you there."
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11-12-2016, 06:36 PM
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#19
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Senior Member
Join Date: Sep 2014
Location: Western AZ
Posts: 2,404
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Are you aware of any other Motor home owners that have this same issue? And are Motor homes the only victims?
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11-12-2016, 08:59 PM
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#20
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Senior Member
Join Date: Jan 2013
Location: Space Coast of Florida
Posts: 4,022
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One thought, do you run your generator while underway? Is your generator in the front and exhaust out on the drivers side? Just a thought...
__________________
2016 Siverback 33IK, Towed 50K+ mile
2018 Ford F-350 Lariat 6.7L V8 Diesel 4WD Crew Cab
"If you don't know where you are going, any road will get you there."
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