Oil type and temp Questions (houston area)

Zaggeron · 09-08-2011, 05:41 PM

Quote:

Originally Posted by SPOHN

I defiantly warm mine for at least 15 to 20 minutes being I have a oil cooler and oil pressure gauge. The gauge has let me see some high pressure up to 130psi when the oil is cold or even at 150 degrees when going down the road at 2.5K RPM's. But as soon as temps hit near 180 degrees it doesn't go past 90-95psi.

So that being said and having a oil cooler I feel it's best to let it warm for who knows how much an aftermarket oil cooler fittings can take over time at those pressures. If it was just the motor I wouldn't think much of it.

If you are really letting it idle for 15 to 20 minutes before driving, you may be trading wear from overheated oil for wear related to unburnt fuel in the intakes and the host of other issues that accompany long periods of engine idle -- idling is not good for the engine.

There's a bunch of discussion of this on the interwebs, but this is a pretty good synopsis

Warm up the car by idling › Dr Karl's Great Moments In Science (ABC Science)

Quote:

Idling an engine is bad in so many ways. The fuel is not completely burnt, so it condenses in drops on the cylinder walls. This leads to both extra wear of the cylinder walls (because the fuel washes the lubricating oil off the walls), and unburnt fuel flowing down the walls and contaminating the oil in the sump. Idling also drops the temperature of the spark plugs, leading to dirty plugs, which can worsen your fuel consumption by some five per cent.

SPOHN · 09-08-2011, 06:27 PM

Quote:

Originally Posted by Zaggeron

If you are really letting it idle for 15 to 20 minutes before driving, you may be trading wear from overheated oil for wear related to unburnt fuel in the intakes and the host of other issues that accompany long periods of engine idle -- idling is not good for the engine.

There's a bunch of discussion of this on the interwebs, but this is a pretty good synopsis

Warm up the car by idling › Dr Karl's Great Moments In Science (ABC Science)

In all honesty I feel the article is driven towards being an environmentalist. Which nothing is wrong with that. But I fail to see how it could be that detrimental to engine wear. If any it's mild, especially with our modern day motors and the technology behind them. It's no big deal for me.

I'll take over idealing over a blown oil cooler line fitting.

Zaggeron · 09-08-2011, 07:38 PM

Quote:

Originally Posted by SPOHN

In all honesty I feel the article is driven towards being an environmentalist. Which nothing is wrong with that. But I fail to see how it could be that detrimental to engine wear. If any it's mild, especially with our modern day motors and the technology behind them. It's no big deal for me.

I'll take over idealing over a blown oil cooler line fitting.

I did notice the enviro-bent, but I don't think that was the thrust. Most of the major points relating to wear I posted in that quote.

The general consensus nowadays is that the old conventional wisdom of letting the car reach operating temperatures via letting it sit and idle doesn't apply to most modern cars -- gentle driving until proper temperatures are reached is better for the vehicle in general.

Having an oil cooler may put you in a different situation if you need to worry about excessive pressure blowing fittings

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