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RE: Oil pressure & weather conditions - 3406E - Yesterday
(Yesterday )Rawze Wrote: first and foremost ... bad deletes can make the oil run hotter than it should, and therefore cause lower than normal oil pressures as a result.
next ... it is very common for oil pressure to drop if the oil is getting too much soot in it. It clogs the oil filter and causes oil pressures to run low. - Changte the oil with fresh oil, and the poressures come back to normal for a few weeks. <-- that is a clkear sign of excfess soot in the oil.
and for reference... 32-34 psi while driving (enigne revved up and at driving speeds) is normal.. anything below about 30-psi when driving is too low, and there is something wrong.
At idle,. anything below about 28 or so is too low, unless oilk is real hot, then anythng below about 18-20 would be until oil cools off.
and.. STOP USING GARBAGE SYNTHETIC OILS unless you have some dammned extreme cold or something to require it. Your wasting your moneys and time completely otherwise.. and causing more harm then good if that syn oi8l is thinner than the recommended 40-wt that the engine calls for.
and.. yeah.. a gallon of gears lube on an older engine that likely has higher than normal bearing clearances is not a bad idea too.
and... if your almost at a million miles.. WHEN IS THE LAST TIME the bottom end was done?. All rod-main bearings replaced?. Its due at 800k miles to prevent wrist pin failure and a piston going thru the block without any warning!.
It’s not deleted of any sort still running egr, planned on getting it deleted when Rebuilding
RE: Oil pressure & weather conditions - mikkhh - Yesterday
When was the last time the EGR cooler was cleaned? Intake EGR mixer pipe cleaned? IMAP and back pressure sensor replaced?
In my area Rotella T6 full synthetic costs 10x more than good brand 15w40 mineral or 10w40 semo synthetic.
RE: Oil pressure & weather conditions - 3406E - Yesterday
All This time i thought full syn was better,I’m going start to use the t4 15-40
RE: Oil pressure & weather conditions - marek4792 - Yesterday
Assuming your tune isn't the issue like Rawze says or an underlying performance/ cooling issue, your oil pump could have a weak/ broken regulating spring. I ran into that one on mine. Went from mid to high 30's down into the low 30's one day. Swapped when doing rods and mains and it returned to high 30's. Of course each engine is different. Most important if the proper gear lash can't be obtained, get another one until it does.
RE: Oil pressure & weather conditions - mikkhh - Yesterday
(Yesterday )mikkhh Wrote: Why you waste money on synthetic oil?
Mineral Rotella 15w40 will work just fine.
5w40 will break down faster towards base viscosity which is 5w on 5w40 compared to 15w on 15w40 .
https://rawze.com/forums/showthread.php?tid=1913
Well I made little mistake with that viscosity assumption, in my area they sell 5w40 Rotella T6, BUT it can be either 10w30 or 15w40 or 5w40 or 0w40...
RE: Oil pressure & weather conditions - 3406E - Yesterday
In my area 15w 40 t4 is like 85 bucks and the t6 15-40 is 126 I think. 5gals
RE: Oil pressure & weather conditions - 3406E - Yesterday
So just to clear up my confusion you guys are saying the T4 15w 40 is thicker than the 15w 40 t6?
I thought full syn would be thicker. Or do i have it backwards