Thread: Mono-grade V Multi-grade oil in stationary motor

Originally Posted by TonyC

Thanks Rick,
I'll just use the same oil as the 300 Tdi gets then,

Tony

Perfect

Originally Posted by shack

Wouldn't the presence or absence of a filter change things as well, certainly on the detergent vs non detergent front?

Not really IMO.

If things are clean internally and well serviced from the beginning...
A full flow filter does bugger all, it pretty much just catches debris if you have a component failure. Most are up around beta2=25 to 35, which is pretty coarse filtering.
Real filtering only happens with a by-pass filter, and I'd rather have stuff suspended and dispersed so it drains at the next oil change than accumulate and create sludge regardless if the engine is with or without a filter.

In the old days detergents may have created chamber deposits, (metallic ash additives) and race oils didn't and some still don't use them as they can create detonation issues for the same reasons but by and large it's a non issue.