best synthetic oil and m/t oil??

[Hershey]

I used 5w-20 and 5w-30 Shell synthetic due to quieter engine , especially on interstate . That oil was less than $3 a quart . Also used Pennzoil Platinum at times . I think the Canadian tires Formula synthetic is SHELL . I've posted used oil analysises for the Yarises we had .

[tmontague]

Originally Posted by Hershey

I used 5w-20 and 5w-30 Shell synthetic due to quieter engine , especially on interstate . That oil was less than $3 a quart . Also used Pennzoil Platinum at times . I think the Canadian tires Formula synthetic is SHELL . I've posted used oil analysises for the Yarises we had .

Yes, i've read that a few times as well, ct's formula syn is made by Shell. It's not a pure syn oil but the price is awesome on sale and my engine looks brand new inside so I'll stick with what seems to be working and is economical. Plus the winter start ups are much easier. Although i'm adding a block heater this summer.

[sheekeebut]

Originally Posted by Hershey

I used 5w-20 and 5w-30 Shell synthetic due to quieter engine , especially on interstate . That oil was less than $3 a quart . Also used Pennzoil Platinum at times . I think the Canadian tires Formula synthetic is SHELL . I've posted used oil analysises for the Yarises we had .

Have you used or analyzed Mobil1 5W30 or Castrol Edge 5W30?

[Hershey]

Originally Posted by sheekeebut

Have you used or analyzed Mobil1 5W30 or Castrol Edge 5W30?

Sorry , no , just the SHELL and Pennzoil . Using Mobil1 A.F.E. 0w-20 in a '13 FIT . No U.O.A.s for that yet .

[UberSilver]

I'm posting in this very old thread because I believe that better oil is more critical on our older engines. I'm one of those people that drive my cars until they are totalled or so tired that they must be put down.

I've run synthetic oils for a very long time. When I was a kid I started to use synthetic in my air cooled motorcycles. At the time(mid 70's) the only brand making synthetic was Mobil1.

So for decades I was a big fan of Mobil1 oil. In the last few years I've seen more poor results in the form of UOA's for Mibil1 than ever before.

If you need a cheap synthetic oil, I say the Penzoil Platinum has taken to top spot from Mobil, as far as popular store bought brands. The UOA's show this to be the case.

For some time now I've been using Royal Purple and find it to be far superior to the more easy to find Synthetics.

If you buy RP in a 5-gallon jug, it can be had for under $7. per quart.

My 1.5 liter loves the stuff, and revs smoother with RP, than with any other oils I've tried.