so I have a tundra, and today I noticed that the oil pressure varies with the rpm of my engine, granted it should a little, but I'm talking a big difference. I dont think its done this before (I think I would have noticed) but I realized it today. Its an 04, bought preowned from a dealership and I've put about 8k miles since I got it. Any ideas of whats causing it to change?

2/18/2007 10:18:11 PM

not abnormal for pressure to fluctuate as much as 40-50psi or so throughout an rpm range.

as long as it's not real low or real high don't worry about it.

2/18/2007 10:20:26 PM

when was the last time you changed the oil

I used to have a car that would start having a squirly oil pressure about every 3000 miles. Thats how i knew it was time to change the oil

2/18/2007 10:23:57 PM

Oil pressure fluctuating with RPM is what you want. It means the oil pump is working.

2/18/2007 10:43:02 PM

I changed the oil about 3100 miles ago (taking it in for the 60k check up this week), but its never fluctuated as much as it is right now. when I idle, it will drop big time, then at take off it jumps to almost the top of the range. I was just worried because its never changed like this before.

2/18/2007 11:56:32 PM

what yr tundra?

and i assume you have checked the oil.

2/18/2007 11:57:32 PM

its an 04, and yes, normal levels on the oil.

2/18/2007 11:59:23 PM

eh replace with higher viscosity?

2/19/2007 12:48:29 AM

as the bearings get worn, you will see a bigger dicrepancy in the oil pressure. I had a truck one time that would have 50 psi when it was cold and drop to less than 5 when it was idling and hot. 1500 rpm difference on it could mean a good 20 psi difference.

2/19/2007 7:15:26 AM

yea i get the same shit. around 50 when cold and about 15-20 when idling hot

2/19/2007 7:28:02 AM

it's fine. buddies' '06 does the same. and i'm talking about an almost full gauge sweep.

2/19/2007 11:35:29 AM

2/19/2007 6:28:12 PM

thanks underPSI, thats pretty much all I wanted to know.

2/19/2007 8:09:21 PM

like i said in the first reply...

[Edited on February 19, 2007 at 8:16 PM. Reason : .]

2/19/2007 8:13:53 PM

lol

2/19/2007 10:43:12 PM