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I want to be clear my previous comments on additives only relates to crank case oil. I believe there is much benefit to be had from fuel additives in the right situation but like anything else there are good and bad ones.

I spent one year as a apprentice under a ford technician then went to Mazda for 7 years after that I worked for emergency one as a electrician manufacturing custom fire trucks for about 2 years. Then I decided to go to the parts side of things and worked in the aftermarket as a parts sales...

I have spent most of my working career in the automotive dealers as a technician. So yes but mostly with smaller gasoline engines.

Black stone labs will test any type of automotive fluid and give you complete analysis for something stupid cheap like $25. So if one was genuinely concerned take a sample and send it in they will tell you all you need to know. They are so specific they can tell you what components are wearing...

In most cases off the shelf oil is more than sufficient for the use that a hobbyist is putting these engines through. When you start adding things to the oil you buy there can be adverse effects that you do not expect. Yes adding zddp sounds like a great idea and it may be in most cases but how...

I have spent hours researching oil and additives and to sum it up I will say that they are not necessary. If you use any form of quality oil then the additive package in that oil is already engineered to the point that additives would disrupt the balance of the original base additive package. So...