Are you guys talkin about Amsoil XL-7500 or the Amsoil ATM (gold label)...??

Ive been using XL-7500...going to switch to ATM soon

 

I run the oil you mentioned all year long.

 

checkout 'the oil journals' for more info. dont forget amsoil series 2000 0-30w is their best formula so far as I know

 

I would not agree there. I've used Amsoil for years and found their 5W30 and 10W30 to be better overall. The 0W30 is a little too thin for the S2000 and frankly, doesn't last as long - no matter what Amsoil claims. I've used the 0W30 in two of my other cars from the time Amsoil introduced the oil and then later switched to the 5W30 and found an overall improvement in oil life (stayed cleaner longer), reduced consumption and better mileage. The bottom line is that Amsoil's Series 2000 0W30 is not worth the added expense when compared to the 5W30 and the 10W30 they offer. It would be a great oil for extremely cold climates, but not in moderate to hot climates.

I use the 5W30 in the winter because the formulation is very similar to the 10W30, only slightly thinner. Amsoil's 10W30 is the best on the market (IMHO). The benefit of the 5W30 is that you get slightly better mileage and a little better cold start pumpability.

Amsoil's 10W30 is a fantastic choice for the S2000 year round, however I recommend the 5W30 for cold winter climates. My personal selection for my S2000 is the 5W30 winter and the 5W40 (Euro Formula) for the summer, however I wouldn't hesitate to use the 10W30 any time of the year.

 

I have used the Amsoil 10W-40 with no adverse effects for the last two changes. In fact, I prefer it to Redline 10W30 or 10W40.
I chose it due to availability. I can get it locally just like Redline. I felt that I was burning the Redline sooner and my consumption has also decreased (somewhat).

 

I too am not convinced 0w30 Series 2000 is worth the extra coin - I would stick with ATM.

I have been a Red Line user for many years, but I do not consider them at the forefront of technology anymore. There are some aspects of their add pack I find old-fashioned, and there have been some odd UOA's at BITOG. Odd in that when users switch to RL they see elevated levels of some metals - it is not clear whether RL is acting as a detergent/emulsifier, or is causing the wear metals. But a lot of them are Honda's.

I think the new amine additives, boron, and other AW/AF's are where it is at - Mobil1 is moving in that direction, Delvac and LE already there. The new API "4' spec will be tough, and old-school technology will not make it.

Perfect examples of the new technology are the Motorcraft oils, especially the synblend 5w20. I was very skeptical of this vis, but Conoco (the supplier) has produced a thin oil with advanced additive componentry, and the stuff flat-out delivers.

Asa Ferris Bueller said, "Life moves pretty fast...".

 

RR, how much oil pressure drop should I see from going to 10W-40 from 10W30. I am concerned at how low it is ~75-80 psi.

 

do you still use 10w-40

 

Dang.. 4year old thread...

 

LOL