Engine oil Mobil or PENNZOIL

Mobil 1 ESP 5W30 and Delvac 5W40 are right next to each other at Walmart and usually within a dollar of each other in price. Our 2 cars use Mobil 1 ESP and my diesel Jeep uses Delvac 5W40. Both are good oils, so I think it will just be your personal preference. Blackstone tests will tell you the story on your oil and intervals better than Reddit.

Mobil 1 Turbo Diesel Truck 5W-40 in an ALH since new. 10K OCI, engine with 280K running like new.

Mobil 1 ESP 5W40

Mobil1 is great oil and what I personally use.

One of my cars has 240,000 miles and burns 1/2 a quart in 10,000 miles using Mobile 1 5W-20

10W-40 full synthetic Mobil 1 fixed that on my 05 Rio with the B6 Mazda engine. The sound goes away shortly after an oil change and it stays away for about 2 or 3,000 mi until the oil breaks down and it starts to make the noise again.

Great oil, I go with the Ultra Platinum. So far it's been the absolute quietest (based on subjective valvetrain sound) and smoothest driving oil I ever used. I tried OEM, Valvoline, Castrol. Nothing was as smooth as the Pennzoil even after a few thousand miles. I still change it every 5k for peace of mind.

I swear by penz ultra platinum/euro platinum in my cars. Really good anti wear additive package in that stuff.

I've been running Mobil ESP 0w20 (VW508) since my 1st oil change at 3k miles (5 months into ownership), then another oil change at 7600 miles 10 months later. I've ran a few Auto-X events, a light educational track day (not pushing the car too much), and certainly am otherwise not shy with the throttle at all. I have also had 1k miles on my stage 1 tune since July.

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.