Best oil.

[vyv_cox]

Volvo used to sell a mineral oil at eye watering prices however I believe the main difference between it and supermarket oils was the inclusion of an anti rust additive . Possibly a benefit at layup.

Very many years ago a long-retired colleague of mine had to solve a problem that might be thought impossible. This was the corrosion of dipsticks in a wide variety of engines during regular use. The result of his work was one of the first anti-corrosion additives in engine oils.

 

[Bilgediver]

I use LIDL oil, good stuff, semi synthetic, has all the correct api, eec, ad infinitum etc ratings and is fine in my marine diesels, diesel car and petrol motorbike!

I have seen straight mineral oil at Lidl....Depends on what time of the month....