Honda of Japan suggests 5W-40
12-06-2006, 12:48 PM
#52
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Run what Honda recomends, half the assclowns on this board don't have a clue what they are talking about.
Like someone else said: Who are you going to trust? Honda engineers or some dude on the internet?
Like someone else said: Who are you going to trust? Honda engineers or some dude on the internet?
12-06-2006, 01:22 PM
#54
I'd be willing to bet that one oil change interval, here at the beginning of winter with 10w20 won't hurt anything. Then again, it's not my motor. If you were tracking it, there's no way I'd use underweight oil but, the dawdling that represents normal driving isn't that hard on the motor. When the level drops between oil changes, I'd top if off with 10w30.
12-06-2006, 04:35 PM
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[QUOTE=Ek9,Dec 6 2006, 05:22 PM]I'd be willing to bet that one oil change interval, here at the beginning of winter with 10w20 won't hurt anything. Then again, it's not my motor.
12-06-2006, 10:47 PM
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Originally Posted by S2kracka,Dec 6 2006, 01:48 PM
Like someone else said: Who are you going to trust? Honda engineers or some dude on the internet?
I dun't trust you
12-07-2006, 05:55 AM
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brimstone Posted: Dec 6 2006, 07:48 PM
IMO it is not necessary to recommend a xxW-40 oil for the conditions you describe.
The cooling system is very capable of handeling (getting rid of) the heat generated by the engine at any time.
Sure, the oil will get a bit hotter and thinner, it will start to flow faster too and that is what you want.
Faster flowing oil will cool all the engine parts better.
Recommending a quality synthetic xxW-30 makes more sense IMO.
Dino ILSAC GF-4 oils are just as good, no doubt, but IMO syn oils will stay good for a longer time.
We will never really know why Honda doesn't back-spec 5W-20 for the S2000.
Because they tested it and it failed?
Or becasue they didn't test it because the number of S2000's sold worldwide isn't worth it?
Fact is that it is not recommended.
Another fact is that engine oil development has not stopped and modern oils are pretty good, better then ever.
AE Haas should have bought an S2000 and used 5W-20 in it to report back to us with outstanding UOA's.....
Basically, here's what I've deduced after learning what I've learned here, on bitog, and independent reading:
-You shift at the redline in 1st, 2nd, and sometimes 3rd, then get on the highway to cruise in 6th gear.
-You don't autox, track, or do similar activities that put stress on the engine continuously for prolonged periods of time.
-You sometimes take a chance and go over 100mph for a short interval.
etc.
You should use xW-30, you'll be fine. Your engine will most definitely not exceed its preset operating temperature range, and 30 weight doesn't get too thin for our engine at those temperatures, its perfectly fine to use.
Now;
If you track, autox
If where you drive the speed laws don't exist and you naturally/casually exceed 120mph on many drives, or cruise at those speeds, or higher.
VTEC, a lot (prolonged periods, etc), only measurable in "duration" and not "times used VTEC"
You should use xW-40, your engine most likely runs higher temperatures due to the extra and continuous strain you put on it (which is fine, but use the right oil).
-You shift at the redline in 1st, 2nd, and sometimes 3rd, then get on the highway to cruise in 6th gear.
-You don't autox, track, or do similar activities that put stress on the engine continuously for prolonged periods of time.
-You sometimes take a chance and go over 100mph for a short interval.
etc.
You should use xW-30, you'll be fine. Your engine will most definitely not exceed its preset operating temperature range, and 30 weight doesn't get too thin for our engine at those temperatures, its perfectly fine to use.
Now;
If you track, autox
If where you drive the speed laws don't exist and you naturally/casually exceed 120mph on many drives, or cruise at those speeds, or higher.
VTEC, a lot (prolonged periods, etc), only measurable in "duration" and not "times used VTEC"
You should use xW-40, your engine most likely runs higher temperatures due to the extra and continuous strain you put on it (which is fine, but use the right oil).
The cooling system is very capable of handeling (getting rid of) the heat generated by the engine at any time.
Sure, the oil will get a bit hotter and thinner, it will start to flow faster too and that is what you want.
Faster flowing oil will cool all the engine parts better.
Recommending a quality synthetic xxW-30 makes more sense IMO.
Dino ILSAC GF-4 oils are just as good, no doubt, but IMO syn oils will stay good for a longer time.
We will never really know why Honda doesn't back-spec 5W-20 for the S2000.
Because they tested it and it failed?
Or becasue they didn't test it because the number of S2000's sold worldwide isn't worth it?
Fact is that it is not recommended.
Another fact is that engine oil development has not stopped and modern oils are pretty good, better then ever.
AE Haas should have bought an S2000 and used 5W-20 in it to report back to us with outstanding UOA's.....
12-07-2006, 06:36 AM
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Originally Posted by SpitfireS,Dec 7 2006, 09:55 AM
AE Haas should have bought an S2000 and used 5W-20 in it to report back to us with outstanding UOA's.....
thanks
12-07-2006, 06:56 AM
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AE Haas disagrees with you, track and autox operating conditions seem to be ~312F, if I recall correctly.
I went ahead and assumed that continous high-revving and high-speed conditions are similar, although I can see how the cooling system might work very well under those conditions.
Still, the way I run my car night after night on the highway, I wouldn't be able to sleep if I ran xW-30.
Look, here's my logic:
What ever operating temperature cSt Honda found to be suitable for this car, its somewhere between the ranges of a 30 weight and a 40 weight oil. I feel my conditions are rough, and more prone to sheering than 65mph cruising, and I feel more comfortable being on the thick end of the spectrum.
Now, I do wish I could find a 0W-40, but that is proving to be a hard task.
I went ahead and assumed that continous high-revving and high-speed conditions are similar, although I can see how the cooling system might work very well under those conditions.
Still, the way I run my car night after night on the highway, I wouldn't be able to sleep if I ran xW-30.
Look, here's my logic:
What ever operating temperature cSt Honda found to be suitable for this car, its somewhere between the ranges of a 30 weight and a 40 weight oil. I feel my conditions are rough, and more prone to sheering than 65mph cruising, and I feel more comfortable being on the thick end of the spectrum.
Now, I do wish I could find a 0W-40, but that is proving to be a hard task.
12-07-2006, 06:58 AM
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Originally Posted by gabster,Dec 7 2006, 07:36 AM
Im sorry can you refrase that im bad with acronames?
thanks
thanks
S2000 is the car you drive
(not really an acronym though, heh)UOA is oil analysis (google for "blackstone lab")