Coach_Rose

I have noticed since my last oil change that my pressure on cold starts (due to cold weather-by Texas standards) is very high. If I push it over 2500rpm before 5 or 6 miles it will peg the oil guage at 120.

Does this sound right? Could they have put the wrong oil in?

Thanks,
Bob

FLY BY Z

Oil pressure will always be high when the oil is cold due to the cold making it thick. If you are taking it to 5 or 6K before the oil gets hot and returns to a normal pressure you are giving your motor away to the junkyard each time you press the throttle. Take it easy when the motor is cold, wild man!

Coach_Rose

I'm going very easy on it, but it makes it hard to pull out into traffic when you can't go above 2500rpm. It just doesn't seem normal to have it that high after it has had some time to warm up. Maybe I just didn't notice it before the last oil change since it hadn't been cold.

Thanks,
Bob

FLY BY Z

Well, if the motor is warm and the pressure is still high it's fine. If the gauge is pegged to the right and never moves then you have a problem. If you have to get up to speed in a hurry, just shift more often and take it up to 3K. That should be fine.

350zdanny

I've never seen my oil pressure guage shoot up like that and it was a whopping 0 degrees here last week.

Can't you use a lighter weight in the "winter" to counter this?

yobri

iTrader: (2)

My first oil change rendered a high oil pressure reading, which from this board was considered relatively normal (this in a climate that is not necessarily freezing cold... ~50 or so degree start ups. Do take it easy though... shift max 3k if your engine is not properly warmed up (that is by driving slowly, NOT by idling the engine). If you shift 3k up to 6th, you shouldn't have any problem engaging traffic in the slow lane.

mchapman

iTrader: (1)

Whats wrong with idling?

Murray

FLY BY Z

Honestly, all you are doing is increasing emmisions and shortening spark plug life. Idling is terrible for your motor. Do not idle more than 30 seconds (I usually idle 10 seconds) after startup. It is better to drive the car. Just excercise moderation in throttle application until oil pressure normalizes and the coolant temp comes up a little. This is where an oil temp gauge would be very beneficial because you want to stay out of the throttle not until the coolant is up to temp, but the oil. I have no idea what heats to temp first.

mchapman

iTrader: (1)

Hmm, ok I will take into consideration and research the subject.

UPDATE: I found this thread,

https://my350z.com/forum/showthread....ming+up+engine


Thanks!
Murray