I used the 0W30 German Castrol and it just made my sewing machine even louder.

Put the mobil 1 5w-30 back in and it got significantly quieter.

 

Mobil 1 5w30 Syn....

 

I just **** in there and it works just fine.

 

royal purple

 

Mobil 1 10-30

 

I find it odd how the WORST choice of the Mobil line is winning the pole. I thought with as many oil threads that are floating around, people would know the 5w30 is sub-par.

I run Mobil 1 5w40 in both my WS6 and 5.3 Z-71. When I couldn't get that during the re-labeling of the 5w40, I used the 0w40 with good results. I'm also waiting for some more UOAs of the Pennzoil Platinum.

 

i use castrol synthetic blend 10w30. im too poor to get full synthetic

 

Rotella 15w-40

 

Thats with 121k on the clock.

 

Same as H-D oil for the bikes.Good stuff.

 

mobile 1 0w40

 

I'm suprised Mobil 1 is in the lead. I would have thought the German Castrol would be first choice.

 

I use any old 10w30 stuff.
Car running fine 130k, and 46k was by me with any old oil from Walmart. Well I actually get it from a local parts place, who said that its the same stuff just in a different bottle. Anyway no problems yet, however as many people seem to be using mobil 1 on here I may give it a go after the heads/cam swap this weekend.

 

Mobil 1 0w-40 here...

I've tried german castrol and royal purple 5w-30, no big differences.

 

gtx 10w-30

 

I use Pennzoil Platinum 5w-30. Works fine.

 

Royal Purple 20W50

 

M1 10-30 or RP 10-30 here during the warmer months then for the cooler months until it goes into storage for the winter I use RP 5-30

 

german castol 0-30

 

It worries me that the most used oil on the poll is Mobil 1 5W-30. That's a lot of people suffering from increased wear, louder than necessary piston slap/valvetrain tick and a lot of oil consumption

I'll use GC 0W-30 as long as I can get it. I got enough in the garage for the next 2 years (24 quarts just chillin' all bought on sale at $4.49/qt. ).