C66 Racing

Following the rest of the oil industry, AMSOIL will increase prices about 3-6% across its lubricant line on Aug 1st. If you are an AMSOIL user or are considering AMSOIL, picking some up before Aug 1st would save you a little bit.

As always, I'm more than happy to ensure forum members can get AMSOIL at dealer wholesale, about 25% below retail, via the AMSOIL Preferred Customer Program. Drop me a PM if interested.

Special note: I'll be unable to access the forum from the 26th to the end of the month. So if you like to contact me about pricing or the Preferred Customer Program, I'd appreciate it if you contacted me before the 26th.

buster710

Hi subdriver. Does Amsoil plan on upgraded their product comparison testing? Pennzoil is using the Seq IIIG test for wear performance, while Amsoil is using a test (4-ball wear) that has nothing to do with an actual engine. I'm hoping they update their marketing a bit. Some of these new oils have caught up to Amsoil is looks like.

C66 Racing

Don't know what their plans are, but will suggest this to them. Using the Seq III test is not totally new to them as they ran their main SAE 10w30 against the previous version of this standard, but for triple the required length, so they may be receptive:
AMSOIL SAE 10w30 Seq IIIF Testing

I know the 4-***** test doesn't get much credibility for motor oils, but in my opinion, I think that there is a fairly good correlation to low 4-***** wear results and the wear results of the used oil analysis tests I see on the oil forums. Totally unscientific and just a gut feel on my part.

As for the catching up, I somewhat agree. The latest API standards tightened the requirements forcing most oils to get better while providing limits on the ZDDP allowed for those that wanted to use more. The overall effect is probably a reduction in performance gap between the best and worst of oils on the market. The other effect might be gradual improvements in Group III synthetics (highly hydrocracked mineral oil allowed to be marketed by the API as synthetic) that close the gap to Group IV PAO basestock synthetics.

What you don't see much in motor oil testing is viscosity shear and for a track car I think that is very important. I am somewhat extrapolating performance from AMSOIL's motorcycle and gear lube testing, but there are many many lubricants on the market in those areas that perform very poorly in shear stability. In this area the Group IV basestock performs very well. For a track driven car, I'd rather have a Group IV (rather than Group III) basestock fluid in my engine.