steve59

Hi guys

I have a question about this engine at high-speed.

It happens that I drive sometimes (when the trafic allows it) very fast on German Autobahns, this means about 1-2 hours with above 200 km/h.

My concern is that the oil used with this engine is 5W-20 (right?), this means that it is liquid like water and has no capacity on high temperatures. And as I cannot controle temperature (only water), I have a doubt that this car is made for speeding?

Any experiences or comments?

Steve

GGIII

As 5W-20 tends to burn far easier than others, I run 10W-30 in my car with no issues.

Vidgomd

so your saying that the factory set up is not right for high speed driving...
what effects should changing to a thicker oil have on the car or what effects should it have?

GGIII

The thicker oil will resist the effects of heating better. I switched to it because I live in a moderate climate (It -never- snows heavily here, though it gets a lil' chilly.)

If you're in cold cold weather, don't go thicker.

VernLaw

From what I understand these cars come from the factory with a synthetic blend 5W 20 oil. Synthetic oils do not break down under high temperatures as rapidly as fossil oils.

If you are concerned about the temperature, run a pure synthetic with a slightly higher viscosity and monitor the temperature gauge. In Germany, it is cold more often than hot outside anyway, so you should have no problems.

Do not run pure synthetic unless your engine is properly broken in though. Perhaps 1500 miles or so.

Also be sure that you keep the proper Antifreeze mixture in your radiator; in case you run a high temp, you do NOT want pure water in your system.

steve59

My experience with a Audi A6 4.2, which comes with an oil temperature gauge, is that exterior temperature does'nt matter at all. Speed matters, but not exterior temperature.

Come the mustang with an oil-cooler?

I think I will switch to a 5-W40, what is good for a Porsche shouldn't be bad for a mustang :-)

VernLaw

True, speed causes an increase in airflow around the engine, creating a 'heat wicking' effect. But the colder outside air temperature affects the car in two ways:
1. Intake air temperature - SAE has a factor to adjust for air temp due to increased hp from cold outside air
2. The above mentioned "wicking" effect is amplified by colder outside temp


Of course the presence of cold (sub 15 C) is not the effect I was referring to. I was really thinking about the negative effect of hot temps (perhaps over 35 C). A 15 or 20 C increase in outside temp has a dramatic impact on your cars ability to keep itself cool.

As for oil cooler, perhaps one could be 'rigged' to work, but I live wher the temp hovers around 35 to 40 C in the summer so we are well versed in over-heated vehicles! [sm=badbadbad.gif]

Regardless, all us state-side guys are envious of someone who gets to drive in excess of 140 MPH on a daily basis... legally.