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Message: [QUOTE="TARM, post: 338727, member: 578"] I have been swearing off Craptella for a VERY long time. Early on I recall it being one of the only syn oils you could use with atvs as they ran wet clutches. It was one of the only main stream (as oppose to atv specific) syn oils that did not have friction modifiers in it. You know the additive that are there to help prevent friction wear so it would not be an issue with the clutches and was cheap. What might be good for wet clutches and something a ATV owner might be all happy over its just the opposite for engines. Add in oil going thru our injectors and pumps all the more. It always seems to shear faster than most quality syn and dino oils in UAO testing when use is kept consistent. One thing for sure with HPOP injectors your oil can have a direct effect on immediate engine performance unlike most other engine types. For those tuned into there engines and the way they run I am sure you know the sound and fell when you have extended a oil change interval too long. You can feel it not running right. I use to be a UOA nut. I used and tested just about every possible oil the sun. Most all those lost on our last move grrrh!! Spent countless hours checking others doing VOA for before and afters etc.. Looking back I spent way to much $$ on it. After all of that the oil I found to give the best performance and still have a decent price was Schaeffer. They are also the only oil company I spoke to that will actually list and tell you what base oils and additive packages they use. In other words you actually know what you are getting. I am one of those guys that has to have the best if its reasonably possible. I have slowly over the years switch most all my lubricants over to Schaeffers. Call up Mobile One, Valvoline, even Amsoil and ask them to tell you what or can they state if they use Group IVs and only that or if their "syn" oil has group III etc in their BASE oil blends or just anything at all about the base oils they use. Bet all you get is the "its secret squirrel only info" line along with the "we only use what gets the very best performance from extensive testing" line as well. LOL That's just the base oils forget even asking about the additive packages. I have also found that adding the Moly EP is a great way to combat shearings if you run extended OCI (oil change intervals) for those running bypass setups. It looks like its also a good way to get Rotella to last for just a standard OCI LOL I run 9000 but use to run 7000 with no issues but I prefer the full syn. 5w40 base oils as I use it year round and seem to get better throttle response with it. BTW in Dino oils I found Mobil Delvac to be and test out very well also. That was a number of years ago but bet its still good as thats a flag ship for them with big diesels [/QUOTE]