Hey guys,

Anyone knows or has done any research on which is the best Engine oil, and why? I'm comparing Amsoil, Redline, Mobil1. Anyone who wanna say...all oils are the same...Please save that answer for another thread. I'm asking if anyone has done any research, had past experience, or read online to find out the differences. I'm new to Amsoil, but found lot of good info on it online. Redline is the best that I knew of, it still is in the tops. These top quality oil manufacterers make not only great oils for engines, but also for automatic transmissions and rear diff. I'm looking to change the A4 trani oil and rear diff oil. So doing my research. Also wanna stick with THE BEST engine oil available in USA. Not all synthetic oils are the same. Plz share your knowledge and input. I will post some more info and facts later...

Thanks in advance...

 

http://www.bobistheoilguy.com/

 

Here we go again....... (no offense)

Many threads on this, after much research i ended up with the German made Castrol Syn 0-30 (you can get the German oil at Auto Zone). IMO, the winner by a significant margin. (however, the "now available" Euro Mobil-1 0-40 looks good also... Advance Auto Parts has it)

BTW:
Oil filter = K&N HP-1007 (good combo of flow/filtration)
Air Filter = Fram CA 3914 (ditto)
Diff Fluid = Red LIne 75W90 (as good as any synthetic)

 

yup

 

Here is some info.

http://www.1st-in-synthetics.com/dyno_test.htm

http://www.amsoil.com/performancetests/amsoil_vs_mobil1.aspx


AMSOIL the WINNER!!

 

I am the forum vendor for AMSOIL, but that doesn't mean I don't respect the other oils you mentioned, they are both very good.

Here are my personal experiences, and why I switched to AMSOIL. They are not meant to stir up another debate, only to share some info.

- I lost an LS6 to a seized bearing in July 2003 while running Mobil 1 15w50. While I don't really blame the oil on this failure, none of the bearings looked good and at least two had seized. A better oil may or may not have prevented the destruction of my engine until a planned rebuild in Aug 2003.
- I read hundreds of used oil analysis reports, and the above site is a good compilation of them, and came to my own conclusion that AMSOIL was consistently among the best.
- Redline is clearly very good, but is also expensive. What turned me off to Redline is the lack of real data on their website. That notwithstanding, I know lots of other SCCA T1 driver's using Redline and they seem to get good results with it.
- AMSOIL is an American company blending its synthetic lubricants in Superior WI using American workers.
- AMSOIL was founded in 1972 by a retired AF LtCol which sat well with me given my "day" job.
- AMSOIL will not sell its products in stores with large chains (e.g. Walmart), keeping a more "mom and pop" corporate position.
- AMSOIL marketed the first synthetic lubricant to surpass API standards in 1972. Castrol and Mobil 1 didn't join the market for almost two decades. Not sure when Redline came out ( early 80s maybe?).
- AMSOIL has been promoting longer drain intervals for over three decades. Mobil just joined in this year with their new line of Extended Performance oils.
- I ran AMSOIL Series 2000 in my engine for the entire 2004 season and took the motor apart twice, once in April (resulting from a broken timing chain) and once for a rebuild in Sept. In both cases the bearings were so good I didn't put new ones back in, but reused them.
- Last weekend, while leading an SCCA National T1 race here in Memphis, I developed a severe left axle seal leak in my differential, losing at least a quart of diff fluid over the course of the 26 lap race. The diff got so hot, I got a tranny high temp warning (comes in at 277F) with about six laps to go. Given the tranny temp sensor is on the tranny cooler return line, the tranny and the diff were probably both well over 300 degrees. Despite these severe conditions, I ran the car until the end of the race for the victory. I have AMSOIL ATF in my tranny and last years version of AMSOIL Severe Gear Extreme Pressure Synthetic 75w90 in my diff. Would the tranny and diff have held up with another lubricant in them? Who knows. But I can say, they did hold up with AMSOIL in them.