Engine oil VALVOLINE or Shell

I have a buddy that used the Shell Rotella diesel oil that is dirt cheap for his 2009 r1.

I used to run the 10w-40 Valvoline high mileage synthetic blend from Walmart.

I'm at 365,000 km and switched to Shell Rotella T6 probably 30-40k ago. Oil consumption was at last halved - the detergents in that oil really help clean up deposits in the rings, or so I'm told.

Quality synthetic oils provide the lowest oil temps, longest running life and superior lubrication. I use Shell Rotella T5 10W-40 for Texas climate.

I use conventional 20W-50 VR1 for oil, love it.

I've used T6 in my MK4 BEW for 5 years now. Regular changes, no issues at all, and at 1/3, the cost of 'suggested' brand.

As a Shop owner that Services a ton of Euro Cars we pretty much use all the Valvoline Euro Spec'ed Oil. They meet all the OEM requirements as we've also sent it in for testing. I have a 2014 CC APR Stage 3+ and thats what I run, Valvoline 5W40 Euro. No Issues.

Personally I rock she’ll rotella 15w40 in the summer and 5w40 in the winter to aid in cold starting. Seems to work pretty good

Valvoline vr1 20w50 I'm convinced they basically make it for rotary's to begin with.

Shell helix has been fine for me