Engine oil Shell or MOTUL

I use Motul 300v 0w20, plus oil analysis from Blackstone Labs, currently every 6k miles until they tell me otherwise

I would recommended shell ultra 15w50 . KV100 is 20 which is thick as fuck and won't shear down quickly. Mogul 7100 is thin and will shear down to 40 grade and internationally considered garbage oil. Shell is made of group 3+ base oil so its going to perform better.

Rotella 5w40 only. I daily and track mine

Motul 8100 5w-30

Motul 8100 5W40 (track toy)

On an old e36, 5w30 full synthetic no matter the brand would often cause some leaks. Switched to some thicker Rotella oil made for diesels and suddenly no more leaks.

Check the oil recommendation in the manual and then go with castrol edge or motul if you want to go the safe by the books route.

Motul 5w40 - shit is so good you can pour it over your salad.

Worry less about the now old 502.00 spec than the actual oil itself. It's API SN/CF and has MB-Approval 226.5/ 229.31/ 229.51. Even though 505.00 and 505.01 are diesel engine specs, it should be fine in your older car. One of my go-to oils is Shell Rotella T6, which is specifically for diesels, but it's a great oil.

I use Motul oil on all motorcycles because even though its more expensive, its still not that expensive.