Letting the oil warm up

[sk8erord]

I know at least in turbo cars you should always let the oil warm up. That turbo is spinning at a lot higher RPMs than your engine and needs the oil at temp. Plus, colder oil = higher oil pressure which can blow seals, IIRC.

But it's your car... I watch my oil pressure gauge and wait until my oil pressure is normal before I romp on it.

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[Super Werty]

I usually fire it up and do a quick line lock in my driveway... To heat up the tires. Traction is more important than oil temperature....

 

[PonyGrrrl]

I leave the car running when I come home from work until morning when I go back to work again.

You keep saying this and it makes zero sense. You're driving a manual and you're worried about a starter failing. If your starter dies you can get it rolling and pop the clutch to get it started.


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[paul123]

You keep saying this and it makes zero sense. You're driving a manual and you're worried about a starter failing. If your starter dies you can get it rolling and pop the clutch to get it started.

half the stuff on this forum doesn't make much sense. Usually its better than zero sense, so that helps :lol:

 

[Cobra Jet]

Did I miss something in owners manuals where its stated one cannot drive the car right after cold starting and it must be "preheated" like an oven before attempting to drive!?:doh:

 

[drabon74]

Are there any slick 50 type additives that are proven effective on cold startups? I know full syn flows better cold, just wondering if there is an additive that is worth buying.

 

[GT Pony]

I know full syn flows better cold, just wondering if there is an additive that is worth buying.

I doubt it ... just run a good full synthetic oil and cold start protection will be taken care of.

 

[Ecoboosted]

I look at the cylinder head temp and wait for it to get to about 125 before i start driving off and even then i take it easy until it's up to normal operating temp before i drive it hard.

 

[Timewarp]

Does it have an oil pressure gauge?

I'd heard it is better to wait for oil pressure to drop as an indicator of oil viscosity, because the oil temperature is taken from a single point whereas the oil pressure is from the engine as a whole?

 

[GT Pony]

Does it have an oil pressure gauge?

I'd heard it is better to wait for oil pressure to drop as an indicator of oil viscosity, because the oil temperature is taken from a single point whereas the oil pressure is from the engine as a whole?

The oil pressure is taken at a single point also ... usually right after the oil filter before it goes into the engine. Oil temperature is the best parameter to look at to determine when to beat on the engine.

 

[Timewarp]

The oil pressure is taken at a single point also ... usually right after the oil filter before it goes into the engine. Oil temperature is the best parameter to look at to determine when to beat on the engine.

Isn't the pressure consistent though?

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[GT Pony]

Isn't the pressure consistent though?

No ... oil pressure is dependent on both oil viscosity and engine RPM. High viscosity increased oil pressure. High engine RPM increased oil pressure.

Only temperature of the oil changes it's viscosity ... as temperature increases, the viscosity goes down.

 

[sk8erord]

No ... oil pressure is dependent on both oil viscosity and engine RPM. High viscosity increased oil pressure. High engine RPM increased oil pressure.

Only temperature of the oil changes it's viscosity ... as temperature increases, the viscosity goes down.

But as viscosity decreases, so too does oil pressure, which can be viewed on the oil pressure gauge on the perf packs. Yes, it's a range, but the range as a whole decreases as it warms up. So watching oil pressure is a valid way of determining if the oil is warm enough. Especially since our cars don't actually have an oil temp sensor. The computer uses a formula based on other sensors to infer the oil temp.

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[BmacIL]

Just keep your foot out of it (and generally below ~3000 rpm) until your oil temp is normal and cylinder head temp is 174+ deg. These are a good indicator as it's when launch control is available, as stated by a couple others.

General rule of thumb is to start driving pretty shortly after you start the engine from cold (I would wait 10-30 seconds depending on outside temp, to ensure oil is flowing and is everywhere it's needed).

 

[GT Pony]

But as viscosity decreases, so too does oil pressure, which can be viewed on the oil pressure gauge on the perf packs. Yes, it's a range, but the range as a whole decreases as it warms up. So watching oil pressure is a valid way of determining if the oil is warm enough. Especially since our cars don't actually have an oil temp sensor. The computer uses a formula based on other sensors to infer the oil temp.

All S550s have an oil temperature gauge (in the information display) ... but only the PP cars have the oil pressure gauge. I never said you couldn't use oil pressure as an indication, but I've always used the oil temperature gauge. When the needle is right in the middle of the green zone, then the oil is ~200 deg F.

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