Driving while the engine is warming up...
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Driving while the engine is warming up...
I've noticed that everybody says something to the effect of "just don't drive hard until the car is warm." Could someone clarify that please? I'd really love to know because my 1.8T takes longer than any car I've ever driven to warm up (~5 minutes in 40 degree weather) and I am forced to be in fast moving traffic earlier than that. I have taken the "don't drive hard" to mean < 4k rpm, but I would love to know some real answers. Thanks in advance!<p>--frank
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Re: Driving hard while the engine is warming up...
Excellent question,<p>If you use synthetic, which I strongly advise, then you add some safety margin to the warm up. What you are trying to protect are the turbo and engine bearings. These need a layer of oil to "float" moving metal apart. Synthetic gets to those parts substantially faster and may in fact keep some oil between the bearings for several days.<p>The second issue is that the metal parts exposed to combustion gasses need to warm up, which expands the metal slightly to meet tolerances.<p>That said, I NEVER do a full turbo run until the coolant temp gets to top dead center. I would certainly ignore this if there was an emergency.
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What is "harder", 4000 RPM or 1500 RPM up hill?
What is harder on the engine, a higher RPM when cold, or very low RPM. I work at the bottom of a hill, so every night the car's first task is getting me over the hill. The options seem to be either 1500 in 3rd or 4000 in 2nd (at the speed that is appropriate on the hill... Of course I could change speeds, but that ignores the question.) So I tend to do the 1500 in 3rd, but the engine definitely is pulling at that speed and that slope... Anyone got opinions on which is better (or less worse)?
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The temp reading isn't that important
Standard gauges for oil and coolant temp are not known for being scientifically accurate. It appears to me that "normal" operating temp for your car's oil is 170-190 on the gauge. If oil is warmed up to "normal" I would say you can "let 'er rip". (On my 2.8, "normal" seems to be between 200&225)<br> As motorcyclist are known to say;<br> "Keep the rubber side down"<p> Greg "S"