I tried to order some Amsoil for my S2000 CR after reading all of the comments on the oil of choice.
I asked for 10W-30 and got several replies from three sources telling me that Amsoil did not recommend 10W-30 for the S2000 but to buy the European 5W-40.
Have any of you tried the 5W-40 ? I live in SC so cold weather is not an issue.
Give me your thoughts....
Thanks
Yellowbird

 

I dunno why they wouldn't recommend the 10w-30? The 5w-40 is the european weight but Honda recommends the 5w-40 for colder climates. I would say either one would be fine (I believe the 10w-30 would be fine, I already have a case of 10w-30 that will be going in next spring)

 

Amsoil ATM 10w-30 works just fine, as there's a bunch of us that use it. its the best synoil you can get.. if you want to pay the price. You can run it in for 10K or longer if you want to. Then you get your money's worth.

 

I've used Amsoil 10W-30, 0W-30 signature series and 5W-40 European Formula and I liked the 5W-40 the best.

Felt the smoothest the longest with least amount of oil burnt. My engine has 110000 miles on it now BTW.

 

I've used Amsoil 5W30, 10W30 (ATM), Series 2000 0W30, and the Euro 5W40 and found the best performing oil was the ATM (10W30). If you look at the NOACK volatility rating - the 10W30 has the lowest volatility and the 5W30 being second. Amsoil 0W30 and 5W40 both have pretty high volatility ratings.
My car consumes around 1/8 to 1/4 qt per 5000 miles. It varies a little per month. I'm reaching 50,000 miles and will post my next leak down test at 50K. The first leak down was done at 40k and all cylinders were less than 1.5%, with the lowest being 1.2%. I drive the car pretty hard with plenty of VTEC and redline use.
My car showed increased consumption when using any oil other than Amsoil 10W30. The worst consumption was with the 0W30, but the 5W40 was very close in consumption to the 0W30.

 

I want to thank everyone for their reply. This a great forum and the first that I have joined. If you are ever around SC look for a yellow CR and please wave, it really burns me with some S2k drivers around that act like they have a stick up their #@#@#@ and will not wave.....RG

 

I live in ny recently threw mobil 1 10w 30 but ima trow 5w40 amsoil saince its about 2 get cooler.....Wat u guys think?...n yes i agree with yellowbird1 luv this forum

 

http://www.amsoil.com/mygarage/ProductReco...8+HONDA+S2000+Y

 

I just ran an oil change interval with Amsoil 5w40, the results were good but I was expecting better wear numbers given the use of my s2k. I really loved the way the car ran with it though, very smooth and quiet, didn't burn very much oil either. It did shear down to a 30 weight oil though, not a big concern as 30 weights are recommended anyhow.

There was just a used oil analysis posted a few weeks ago on here of Amsoil 5w30 which looked great with very low wear numbers. The wear numbers were lower than I seen on my engine with 5w40. I'm going to be running Amsoil 5w30 next and see how it compares to my previous run with 5w40. I think Amsoil 5w30 is going to show an improvement, it flows faster on cold starts and has a good warm temp viscosity along with good Noack volatility numbers. Looks to be a great year-round oil viscosity from what I can tell looking at the specs and used oil analysis.

Amsoil 10w30 is a really strong oil. If you don't have any cool temps during the year it would work well, if you have any cool temps the 5w30 may actually work better. Their 5w30 and 10w30 have the exact same hot temp viscosity with the 5w30 flowing better on cold starts.

It's important to note that even at 70 degrees F oil thickens quite a bit, which is a temp that doesn't seem overly cold. 5w30 and 0w30 will flow faster through the engine on startup as compared to 10w30 even at temps of 70 degrees. You don't need to see freezing temps to have benefits of improved flow at start-up. With the majority of wear occuring at start-up you can actually lessen overall wear by using an oil that flows faster - i.e. 5w30 and 0w30. These oils have the appropriate viscosity at hot temps, so you get the best of both worlds. It's a great benefit of high quality synthetics protecting at low and high temps. I don't want to run the 0w30 is that it does have higher NOACK volatility numbers and I'd like to keep oil consumption low if possible as my s2k is an ap1. Their 5w30 has a great viscosity index number, great hot temp viscosity, great cold temp flow, and good volatility number. The last used oil analysis of this oil looked great too, so I'm up to trying it next.

 

I am using 5w30 all year round with temperatures ranging from 10 deg cel (50F) to 35 deg cel (95F) in summer.