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rws
03-18-2017, 12:51 PM
On another forum, a fellow was making a case that, as he described it, yellow bottle Pennzoil oil is better and rates higher in testing than synthetics like Mobile1.

I know millions of motors have run a long life on "regular" oil, and synthetics have a large following too. So are there any definitive tests that proves one over the other, or does this remain opinion based?

lakeside53
03-18-2017, 12:53 PM
I will not get suckered into another oil thread! ;)

All I know is that my trucks hydraulic lifters work MUCH better on Mobil 1 than Pennzoil.

flylo
03-18-2017, 01:27 PM
2 stroke ultralight oils were tested & air cooled Pennzoil was rated as #1 for air & liquid cooled 2 stroke engines.

MattiJ
03-18-2017, 01:30 PM
I will not get suckered into another oil thread! ;)

All I know is that my trucks hydraulic lifters work MUCH better on Mobil 1 than Pennzoil.

Should be forbidden in the rules just like relion and politics. ;)

J Tiers
03-18-2017, 02:12 PM
Should be forbidden in the rules just like relion and politics. ;)

And anything to do with tractors, or physics, the RDM method of alignment, and potentially, lathe bearings......

Leadfootin
03-18-2017, 06:06 PM
For lots of long - winded discussions try these links,
http://www.bobistheoilguy.com/
https://540ratblog.wordpress.com/2013/06/20/motor-oil-wear-test-ranking/
First is a large forum, the second is an engineer who ranks oils by their film strength according to his own method. Lots of data and info!

There is a very good reason so many manufacturers offer free oil changes. Use a non-dexos approved oil in a GM direct injection engine for 20,000 miles and you will likely have substantial build up on the back of the intake valves.