My roommate and I split the cost of a case of oil. He needed 5w30 and I didn't think it would hurt anything. Am I wrong? I haven't used it yet, so I can still get 10w30 if theres any reason to.

 

It will work just fine.

 

Thanks! I thought so, but figured I'd double check before changing it.

 

If I was betting, I'd think that it would work just fine. But, Honda has specified 10W-30 for the S2000 while going to 5W-20 for most of their other vehicles. I can't imagine that this was just an oversight. Perhaps the S2000 needs the slightly thicker oil for the best lubrication? They have also specified a different oil filter for the S2000 versus the others. For this reason, I'm sticking with 10W-30 and the new (at least to the US) Honda S2000 Japanese made oil filter.

 

After trying Syn. 10W30, 5W40 I'm very pleased with the 5W30 Syn. motor oil. Engine never needed oil added, including high speed, hard driving & track time. Planning to have the used oil analysis done soon.

 

[QUOTE]Originally posted by Bret
If I was betting, I'd think that it would work just fine.

 

OK, so basically you are saying that 5W-30 does everything that 10W-30 will do plus it is better for below freezing temperatures. Knowing that, then why would a manufacturer ever specify 10W-30? Honda knows that the S2000 will be driven in places that are below freezing, yet they chose 10W-30 instead of 5W-30. It just doesn't make any sense unless there's more to the story.

 

I'm sure I will restate this badly, but from what I've read, the 5W-30 will not be as stable over time as the 10W-30 due to the difference in the additive packages.

 

What is "over time"? It's gonna be taken out in 3k miles and I check it at every fill up.

 

[QUOTE]Originally posted by munckee
What is "over time"?