Engine oil Mobil or Shell

Personally, I use Mobil1 oil in all my "regular" cars, and I often get a discount at O'Reilly when buying 5qts at a time. It's usually around $35 for a 5qt jug. That's pretty cheap.

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

Mobil 1 is one of the better, but you could use any 0w-20. I'd just say stick with a name brand and not something from a gas station.

mobil 1 high mileage synthetic has been good to me.

I would love it if the whole world moved away from fossil fuels and completely to renewable energy resources. Myself included. However, for many practical reasons I currently own a vehicle with an internal combustion engine, and when it needs an oil change I change the oil myself. So what oil do I buy? I buy Mobil1.

We exclusively use Mobil 1 (varying grades and viscosities) per the MFR spec and changing it at the MFR spec mileage (or time, during covid). Never any issues noted. 1985 BMW K100RS (122k miles), 2003 Boxster (177k miles), 2012 Acadia (98k miles), 2013 Jetta SEL (105k miles).

In a pinch, I used Mobil 1.

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 had consumption issues with Mobil-1 0W-40 in the W8, and Castrol/Valvoline 5W-40's showed signs of wear at higher mileage intervals when I ran a 10,000 OCI as recommended by VW.