Engine oil Mobil or Shell

Drove it to 300k using mobile 1 ephm. Sent samples at 10k intervals and blackstone always said i could run it longer. No abnormalities. I trust the oil life monitor.

Valvoline Restore & Protect is apparently amazing when it comes to desludging engines, and Mobil 1 also has some knockoff that claims the same.

I'll always use T6 because it's cheap, available, and damn good oil

Looking over this old post -- an update: I have since migrated to M1 ESPx2 in 0-20. The price has stabilized at $25gallon, and that made all the difference in the world to me, and is allowing me to reduce my OCI's to 5kish.

I use mobil one ESP 5-30

The interesting part is that the T6 was used to tow a camper from Indiana to the Oregon coast where we are now. It’s interesting to see the viscosity, flashpoint and Moly are higher in the T6 even after towing through the mountains and more miles on the change.

Mine has had Mobil 1 Extended Performance 0w20 its entire life (aside from the factory fill) and I've had exactly zero oil consumption or lubrication related issues. It still gets nearly the same fuel economy and is as responsive and smooth as when I bought it, no matter if it's blasting up a steep mountain or baking in the heat of summer traffic.

Every 4k-4500 miles with a Mobil 1 5w30-5w40 mix and some liquimoly oil treatment.

Pretty pricy imo, used it once then when I consulted with friends/a family member I’ve decided to switch to Mobile 5W-40, as this helps with the temps in my area living in a desert lol.

My free oil change just ended And I switch to mobile 1 for this oil change. The result is i got worse gas mileage with the moblie one oil. Like 5 MPG worse.