Quote:
Originally Posted by RubyDually
What climate are you primarily driving in with 5w40 year round?
I'm gathering by the slight consumption your oil sample doesn't have any fuel dilution?
If my memory is correct and I don't know about Fords but that era of Duramax's (LMM) didn't have a ninth injector when it regen'd so there was some dilution. Because of that Amsoil recommended changing the oil sooner than their specs said???
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I live in central Georgia. 60% of miles are in the SE; AL, MS, LA, GA, FL, TN, SC. Once or twice a year to WI, AZ, and TX. There are occasional trips to AR, KY, NC, WV, and OH. I work from home and don't commute.
Yeah, this engine dumps fuel into the cylinder on the exhaust stroke during regen. A lousy idea. The key to keeping the fuel out of the oil is to reduce the frequency of the regen. These trucks don't make good 'grocery getters' (short trips). They will regen too frequently and the EGR coolers will clog. My average regen interval is every 476 miles but it will sometimes go as long as 1400 miles between regen cycles.
The Blackstone tests consistently show "Fuel%" to be <0.5%. Fuel contamination should be <2.0%.
Ken
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