What weight oil do you use?
 

And if you use something other than 10w-30 which is specified by the 1g dsm users manual, why did you switch?

Reason I ask, is my oil pressure is a little on the low side, which isn't too surprising for a high mileage dsm, and i've been thinking about switching to 10w-40 to boost it a bit until i get around to swapping out the oil pump. Is that a terrible idea?

Re: What weight oil do you use?
 

10W-40 is fine to use and falls within Mitsu's spec for use during the warmer months. What is your oil pressure at during idle and hwy cruise?

Re: What weight oil do you use?
 

I use 15W-40. Reason is because I just see a lot of the other guys at similar power levels using thicker weights. And if it's working for them, then hopefully it works for me.

Re: What weight oil do you use?
 

I put 10w-30 synthetic in my quest because I got it for free at the dyno day, and it's working fine. But next oil change I'm going back to 20w-50 regular oil for the win.

Re: What weight oil do you use?
 

I have always used 10-30.

What would be the benefit of running heavier oil? Does not having balance shafts and not porting your relief valve make your oil pressure get pretty high with the heavier stuff too?

Re: What weight oil do you use?
 

I saw a big difference in 15w 40 vs. 10w 30. The newer stuff my oil psi was around 80 at cruising/pulls, and around 50ish at idle, or just below. Old 10w30 it would be around 25 at idle, and 75ish max under load. I ran the oil feed off the filter housing, and no restrictor, and could have been the reason why my turbo detonated, and shifted the center shaft over.

Re: What weight oil do you use?
 

When you start making some decent power you might want to goto some thicker oil to protect that munchgsx stage 1 motor you got.

Re: What weight oil do you use?
 

Amsoil 20w50 with larger main bearing gap by using acl race bearings.

Re: What weight oil do you use?
 

Amsoil 20w50 here as well.

Re: What weight oil do you use?
 

I did use 5w30 valvoline conventional at one point, but did not like how my lifters reacted. So then I went to 10w30 valvoline and it got better. Switched to valvoline full synthetic 10w30 and I leaked everywhere. lol


I plan to run full synthetic 10w30 once I get the car put back together.

Re: What weight oil do you use?
 

I run royal purple 10w-30 right now, but will be switching to Rotalla 10w-30 this weekend.

Re: What weight oil do you use?
 

Good choice :)

Re: What weight oil do you use?
 

thanks

Oh I forgot to mention, I already run Rotella in my DD, I will be switching to rotella in the DSM this weekend.

Re: What weight oil do you use?
 

Why Rotella?

Re: What weight oil do you use?
 

Its a good, proven, heavy-duty conventional oil.

Re: What weight oil do you use?
 

Is it cheap? Or is it expensive like Royoal Purple and AMSOIL? And where do they sell it?

Re: What weight oil do you use?
 

Its priced like every other conventional, I think a gallon (4 quarts) is under $10 at Walmart.

Re: What weight oil do you use?
 

Yeah it's price is extremely reasonable. Right on par with other name brand jugs of conventional oil.

Re: What weight oil do you use?
 

wow, crazy. For once something that people speak positively about that isn't stupidly expensive.

Re: What weight oil do you use?
 

So I should stop running Royal Purple and run this stuff?