Oil changed in diesel trucks

[HappyGuy]

Sounds like the fuel wash down messes up my old way of doing things but I used to run an oil test every 3000 miles for 35.00 and then change the oil when the test show less than 30% of oil life remaining. The mileage you get out of a tow vehicles oil varies wildly with driving conditions and load.

AMSOIL Oil Analyzers Test Kit, Postage Pre-Paid

Yes I run Amsoil but I have run other synthetics such as Royal Purple and obil 1. Some of my vehicles have run over 30000 miles before I performed a change and some have needed a change after 6000 miles.

[spock123]

Does anyone use a test kit to check your oil? I saw on a dmax forum to just change your oil filter that way you only lose a quart of oil. I use synthetic oil and I was changing around 6,000 miles but now it's closer to 10,000 miles. I now change the oil with what it says on the truck but I think I'll buy a test kit and change with what it says


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[JeffLynn]

8k miles, I use to change my own, filter and oil normally cost me $52 but our local Ford shop (Gator Ford Tampa) charges $49.95.. just can't complete and it not cheap oli either.

[Gleaner]

Good info fellas.
Thanks.

[DickiedooFlagman]

Use 15 quarts of Motorcraft 15W40 and Motorcraft filter every 4,000 miles. And change Motorcraft fuel filters every other oil change. Sometimes I change the engine oil myself, but usually at the dealer as the pricing is too close to what I pay doing it myself. Always change the fuel filters myself as I can do it for about $100 less than the dealer.

[mikejm]

Why not change filter with every oil change? If you don't aren't you just running clean oil thru a dirty oil filter?

[bob caldwell]

Delo 400.....7500 miles

[Mahlstedtd]

Duramax 2500 HD. Every 5000.

[DDC]

I just got mine and the dealer wants to change it at 10000 KMS, (about 6250 miles) the first four are free so I don't really care right now, my last diesel back in 2006 I did when the DIC told me to and that was generally about 18000 KMS about 11250 miles.

[mike.t]

Originally Posted by mikejm

Why not change filter with every oil change? If you don't aren't you just running clean oil thru a dirty oil filter?

I think he said the Dmax forum said "just" change the filter.Guess the thinking is it goes in the filter dirty and comes out clean so you throw away one dirty qt. of oil
I think

[ben31]

Every 5000 miles with Rotella T6.

[lckeehne]

I used Mobil 1 synthetic oil. Change every 5k.
Fuel filter every other oil change c

[JoeNanMinn]

I use Mobil Delvac 1300 Super, 15-40. My owners manual sais to change oil every 7500 miles. Thats what I do. In the winter months I use 10-30 up in Minnesota. I change my own and do most of my own maintenance.

[magpi26]

It depends on the type of oil used and the amount of towing you are doing. Synthetic oil interval recommended by Ford is 7,500 miles and 5,000 miles for regular oil under normal usage. They also state that the onboard computer monitoring system is the best source to rely upon and it will automatically adjust that interval based on the oil itself. I'm not sure how accurate all of that is, but if it validates the warranty, that is what counts in my opinion

[dgibbs1955]

I use Royal Purple and have it changed every 10K, and the fuel filter about every 7.5K unfortunately. I can always tell when it needs changing because my mpg really drops. I have recently had the TV "decluttered", chipped and tuned (5 different programs), so I am anxious to see how this mileage will differ when the 7.5K comes back around again. Mine gets driven all around, so I really notice when it heads south.

[Volvodriver]

Mobil Delvac 1300 15w-40. 10 gallons with 3 filters @ 20,000 miles. Change air filters and fuel filter at same time. No I don't do my own work.

Dave

[patrickwstewart]

Same here...Rotella every 5k. Cheap insurance.

[wersqu]

Delvac Mobile 1 synthetic every 10,000 miles.

[M109Rrider]

10k(this can take up to a year for me). Truck tows about 50% of the time. Rotella, delo, delvac, which ever is on sale.

[ACE110]

I use AmsOil 15W-40 full synthetic oil & filter. Change per the DIC.