Synthetic Oil Pressure?

50gt1988 · May 29, 2006

Hey whats everybody's idle and cruising oil pressures on synthetic oil?

DMAN302 · May 29, 2006

SHOULD be no different for the same weights regardless of oil type..ex 10-40 may give you more than 10-30 at temp..but type should not change reading. My little girl sits at 65 cold idle 45-50 warm and 65+ cruise on 10-30 GTX.

50gt1988 · May 29, 2006

Hmm...i just replaced my oil with synthetic on my new motor and before i used to get around 45-50 idle and about 45 cruise. But now it's down to 29 idle and 45 cruise.

DMAN302 · May 29, 2006

I'd look at the filter as a suspect item...a good filter is more important to me than best quality oil, as long as it's clean I feel good about it. Now you indicate 45 idle and 45 cruise..that doesn't sound right unless the idle given is cold idle. 29 is not bad idle warm, how many miles on the 'new' motor?

50gt1988 · May 29, 2006

The filter is a new Ford Motorsports I put in with the oil. Theres 1300 new miles. It's just wierd that the warm idle with the synthetic is 29 when it used to be around 45 before.

DMAN302 · May 29, 2006

Well with the warmer weather the oil will thin up a bit faster than with cooler temps as the engines tend to want to run 10-20 degrees warmer. My pressure will drop 5 pounds from normal (50) when she's hot and the idle gets under 900..where is your idle at? I find you can increase pressure if you take the idle up a tad to say 900..I'm willing to bet you find 5+ pounds there. My reading are with 600 miles on the motor and would expect it to come down a bit once the milage comes up. Keep an eye on it and don't give it too much thought.

50gt1988 · May 29, 2006

Well my idle is already set at 900. I probally should have said this earlier but I went to the track the same day. I didn't run very hard, just went with some friends who were racing. Coming home is when the idle pressure dropped. It never dropped bellow 29.

DMAN302 · May 29, 2006

Really only two options at this time...pull the filter and replace..pull the sender and replace. If it were me because I'm that anal, I'd pull the fluids and filter and see what's what with new in place, no change then maybe look at the sender. Have you checked it today?...I'm sure the internals are fine but if your bothered then those are some options.

50gt1988 · May 29, 2006

Well I'm only a little worried because I have some clutch problems after the track too so this pressure drop at the same time is worring me more. My oil pressure is a mechanical autometer gauge so I know thats working fine.

DMAN302 · May 29, 2006

Clutch issue COULD be...might be...maybe..related to the clutch issue if you've launched the RMS or it's sprung a leak and coated the clutch. Check for oil on the dust sheild or down the back side between the tranny and the block. Still don't see how a leak could affect pressure..but I never say never with a ford.

50gt1988 · May 29, 2006

Well the symptoms I'm haveing are the clutch chatters when starting if first but runs fine after, the oil pressure problem, and a smell of buring plastic when the motor is running.

DMAN302 · May 29, 2006

check for clearance of the clutch cable if running longtubes..I had to thermo rap my cable even with the 'bumper' mac provides on the collector.

aleborjas · May 29, 2006

DMAN302 said:
SHOULD be no different for the same weights regardless of oil type..ex 10-40 may give you more than 10-30 at temp..but type should not change reading. My little girl sits at 65 cold idle 45-50 warm and 65+ cruise on 10-30 GTX.

what oil pump you have and what oil filter u use?

Grn92LX · May 29, 2006

Hotter weather and synthetic oil will lower your pressures. You can try thicker oil for the summer. My engine is doing this now that its a lot hotter out. Next month or so i'm going to try 20w50 as recommended by my builder. I use mobil 1 10w30now with a mobil 1 filter. Probably give royal purrple or amsoil 20w50 a try.

DMAN302 · May 29, 2006

aleborjas said:
what oil pump you have and what oil filter u use?

stock type pump and K&N filter...motor is just a baby so I don't expect the pressure to stay that high a the miles mount, but I'm very pleased with the pressent numbers...highest I've seen a RPM is just past the tick between 50 and 75 on my electric autometer which breaks down to bout 65-66. Engine temps are consistant at 180-185 and I think that helps with the tad higher numbers.

50gt1988 · May 29, 2006

Ok I just poked around a little under the car and theres nothing anywere near the headers and theres no more oil on the back of the engine as usual. I've had a small leak in the oil pan gasket since i built the motor so theres always been small amount of leakage but still no more then usual. Any more ideas?

Oh and also this was Saturday and it was cold and raining so heat wasn't an issue.

DMAN302 · May 29, 2006

Just keep an eye on it...I can relate to the oil pan leak...brand new damn motor and the 1pc gasket leaks...that just pis$es me off, but better than a RMS problem I guess.

50gt1988 · May 29, 2006

Yeah I have the same situation. I went to the one piece gasket to avoid leaks and a small one decided to start. Well I'll keep watching it, see what happens. Thanks for your help.

aleborjas · May 29, 2006

DMAN302 said:
stock type pump and K&N filter...motor is just a baby so I don't expect the pressure to stay that high a the miles mount, but I'm very pleased with the pressent numbers...highest I've seen a RPM is just past the tick between 50 and 75 on my electric autometer which breaks down to bout 65-66. Engine temps are consistant at 180-185 and I think that helps with the tad higher numbers.

the thing is im refreshing my engine and i had the stock aluminum oil pump but its has scratch rotors and when the car gets hot it lower's the presure so i whant to put a new pump wich should i buy?

DMAN302 · May 29, 2006

I'll get ya the part number off my build sheet tonight if you want..send me a PM if I forget.

Synthetic Oil Pressure?

New Member

My mom says thanks for the pearl necklace.

New Member

My mom says thanks for the pearl necklace.

New Member

My mom says thanks for the pearl necklace.

New Member

My mom says thanks for the pearl necklace.

New Member

My mom says thanks for the pearl necklace.

New Member

My mom says thanks for the pearl necklace.

New Member

Fidanza Man!

My mom says thanks for the pearl necklace.

New Member

My mom says thanks for the pearl necklace.

New Member

New Member

My mom says thanks for the pearl necklace.

Similar threads

Privacy & Transparency

Privacy & Transparency