[reddawnman]

Redline 5w20 FTW. Just be sure that you take care of your air filter. If you have a K&N, be sure you don't under or over oil it, and you should be good. With synthetics, your biggest issue is ingested silicates dirtying up the oil faster than just carbon buildup alone.

I leave the redline in for 4K, then change just the filter. IMHO, this is the most economical solution that still keeps stuff clean. At 8-10K or so the whole shebang gets changed.

Also consider using the oversized s2000 filters (mobil1 m1-104) as I am told they have the same bypass and flow specs as ours, but contain quite a bit more filter media.

Best place to ask this question is bobistheoilguy.com forums. Most guys posting there are trying to get 350K+ miles out of the engine, so they definitely don't mess around with the oil... lots of people sending samples to blackstone labs for analysis. At $20 it is fairly cheap insurance.

[emjay]

royalll purple .. gearbox is right it doesn't last tha tlong but its great stuff .. just make sure u change ur oil every 3-4000 km .. which is a good thing not a bad thing u don't want oil in there for months or like sumone said a yr

[EMK20a2]

Originally Posted by brentbigalo

so whats the best for an Si, i would think it would be different than the lx.

Why would it be different?? They have a different weight recomendation, but as far as brand you can use whatever in either car.

Mobil 1 for my K20a2, not daily driven, just sees alot of time on the autox course or the track.

Mobil 1 for my wife's 01 civic lx

Valvoline high milage for my 91 accord daily driver.

[DonJuan4_20]

Interesting how everyone swears by a different brand. In all seriousness there probably isn't much of a difference between most synthetics other than their price. I have been using Valvoline Durablend and I get great performance, but from what I have read in most tuner mags the best oil for constant high performance (as in, I'm headed to the track every weekend) is Redline 5w 20

[EMK20a2]

Wow, old thread, but kind of glad you brought it back. Since then I have switched to Eneos 5W40, it is the single best oil IMO. We did dyno tests with it at the local shop comparing it to mobil 1 and it made more power everytime, under every condition!! Hands down Eneos FTW, the local shop builds tons of cars, tracks them regularly, and has access to all of the major brands and Eneos is going in most if not all of their cars.

When I get a chance I will post up a thread with the dyno #s

[robbclark1]

Originally Posted by EMK20a2

Wow, old thread, but kind of glad you brought it back. Since then I have switched to Eneos 5W40, it is the single best oil IMO. We did dyno tests with it at the local shop comparing it to mobil 1 and it made more power everytime, under every condition!! Hands down Eneos FTW, the local shop builds tons of cars, tracks them regularly, and has access to all of the major brands and Eneos is going in most if not all of their cars.

When I get a chance I will post up a thread with the dyno #s

I hear eneos is good stuff. I hate to be a downer, but I can give a rats ass about "power" from oil. I want oil that protects my engine, an oil that doesn't degrade that quickly, an oil that lubricates where I need it to lubricate. I never understood how oil made "power"??