What is the best oil to use? Currently I used Royal Purple 5W-30, but I'm thinking of switching over to Mobile 1.

 

You're gonna get a lot of different answers. M1, Amsoil, PP, etc.....

 

Supertech

 

Wolf's head.

 

i've used the royal purple 5w30 for the past 69,000 miles in my si. im completely happy and have no complaints about it. i wouldnt use anything else. my oil combo is the rp 5w30, with the hamp synergy filter. every time

 

mobil 1 0w-40

 

what is that 0w-40 stuff? is it some kind of new oil or something?

 

0w is typically for turbo/european cars. i have no idea why he is running it.

 

4qt 10w30, 6/10ths ATF+3. keep that bitch clean!

 

what ever is the cheapest...if keeping it stock

 

I use the royal purple 5w30 in my car and its a good oil.I had no problem till now.I hope it runs smoothly for ever.

 

What car do you drive?

 

"Best" oil is hard to answer. I cannot think of a particular reason why you would want to switch from Royal Purple to Mobile One, unless you just find it easier to get Mobile One and you're changing it often enough that you're not worried about it.

We use Honda provided oil in my daily driver, and Amsoil in my track car.

The main reason we use Amsoil in my track car has more to do with Victor Perri (https://honda-tech.com/forums/member...=getinfo&u=764) being a distributor than it has to do with preferring Amsoil to Royal Purple or anything else. We change the oil frequently enough that any advantage is lost that more expensive oils would have to Amsoil or any other high quality synthetic.

If you're talking about a track car or race car and you want to extend the life of the motor beyond three seasons, then you can get into the exact analyses that you'll find at http://www.bobistheoilguy.com/cms/ . :-) You can talk about this for years and still blow your motor for a reason that has absolutely nothing to do with the quality of the oil you were using!

If you do not care how much money you spend on your oil, then there are a hell of a lot of hard core racers, Honda Challenge, Grand AM, GT and ALMS drivers who will only use Motul Racing oils. My K20A(*) track car started life on this, but it is expensive and hard to come by unless you live in a major metro area on top of somebody who's become a distributor just to keep himself in oil.

 

0w isn't a bad idea for anyone. I've read that when cold the 0w will flow quicker providing better protection for startup.

the 40 weight might not be a good idea because I thought in the manual it only goes up to 30 weight.

If the oil is too thick and the tolerances for the rings and bearings are not designed for it then it might not be the best thing.

I use amsoil 0w-30

 

0w-30 is that safe??

On all the old b/h/f vtec motors used 10w-30. I was under the impression that revving past 8k 10w-30 was basically manditory for protection?

 

Really sick of these threads. Oil is oil, only major difference is between synthetic and non-synthetic, and weight. Sure there may be minor chemical differences, but lets be honest, if you change it regularly and don't race your car it doesn't matter.

 

Valvoline

 

0w-30 is the same as 10w-30 when the temps are hot the 0w-30 is just thinner when cold.

 

Mobile 1 fully syn 0w-30

 

Valvoline is good to, it's what my mechanic uses.

 

I use Shell Rotella 5w-40 Synthetic

 

You trollin.

I ran Mobil 1 5-30 in my Si, sold it at 45K miles. I run Pennzoil Ultra 10-30 in my S2000.

 

5 30 rp

 

5w-30 royal purple. I used to use Mobil 1 5w-30 but after I switched to RP I don't think I'll be going back. Many nay-sayers will disagree but I felt a small gain in power especially at high rpm.

 

You must have a highly calibrated *** because I highly doubt you can feel 5 hp and that's all I believe you may be getting from the RP. It's all in your head dude. You just feel good because you put in good oil, so you feel good when you beat on it, so now you feel like you have more power.

I saw an old episode of horse power tv and they changed the tranny fluid, rear end fluid and oil with royal purple on an old camaro and gained 12 hp. The camaro was old and had shitty fulid so it would have a much better effect than in your late model car that already had decent fluids.