It's winter and thought this may be useful information .
http://www.onedirt.com/tech-stories/...he-differences

nice find....thanks

Should startup a new thread on what oil is used the most by current members.

I just ordered 2 cases of Brad Penn 1 20/50 racing oil on sale now for $59. for a case of 12.

Would be interesting to see who runs what oil in their engines.

Do a quick search here on oil . It has been an ongoing topic of conversation for ever at OSO . Lots of GREAT information if you look . By the way , it's Amsoil Dominator or Mobil 1 V-Twin superoil's for my marine engine .

I use brad penn in my road race car and drag car. I was going to switch the boat over next year on the fresh engines.

Interesting read! But I am still confused just like before!

I have tried researching oil multiple times, but so much of the data is "opinion" or biased. Testing is done by the manufacture, or someone paid off or advertised somewhere for this or that.

Again, great read, and prob the most informative that I have read in a while.

All I know is tearing down engines is proof enough. And a used oil analysis is a must to know how your engine is responding to the oil you are running. I race snowmobiles and cars and I hammer these engines. I am brutal on my engines. But I know how to maintain and rebuild them. I have always used a full synthetic oil in my sleds and cars. After tearing down all my engines I have seen what oils are snake oil and what oils work. Brad Penn, Amsoil, Mobil1 and Redline are top notch depending on your bearing tolerances. You need to run the right oil based on your bearing clearances. I have not had good luck with Valvoline, Pennzoil, or Castrol. But these are good oils for regular engines just not when I was racing using these oils. I have seen bearing scaring, cylinder wall wear with these oils that I did not have with the other oils. But every engine is different and will respond better to certain oils. Cruising around at 2k - 3k rpm in a car is not that hard on a oil. 9,000 rpm on a sled and 6,000 rpm in a car or a boat is a different story.

All I can say is that until you build and tear down your own engines and document the wear you find, is the only proof that I go by. People talk out there a** and have no real experience with engines at all.

I ran a car in a demo derby that had hole in the oil pan during the first heat and it went through two more full heats. I used Mobile1 in that engine. No oil and no oil pressure. The tranny died but the the engine still was running fine when my car was disabled because of the tranny failure not because of the engine and no oil pressure. The engine temp gauge was pegged but it was still running.

I still use Mobile1 in my truck and my cars today. But I use the high mileage version because it is a better oil formulation than the other types Mobil1 offers.

Where?

http://www.buyracingparts.com/lubric...50---case.html

http://matrixsyntheticoils.com/store...ulti_oils.html

Second link has cheaper shipping

Mobil 1 V twin has high ZDDP levels.... I am going to switch to it.

http://www.mobiloil.com/USA-English/...duct_Guide.pdf