> Is driving fast good or bad for the engine?

Is driving fast good or bad for the engine?

Posted at: 2015-01-07 
Assuming the engine is still in good condtion and capable of cruising at 85mph, then it wont do any harm.

If it has a dodgy radiator, worn bearings and can barely do 85mph when it was new, then driving it like that will kill it for sure. But in that case, it was going to die soon anyway.

But a sensible car, with a modern engine, sitting at 1/2 throttle, doing ~3,000 rpm? If should handle that all day.

Speeding tickets is a whole other issue. Your licence may go away before the engine does.

I do not know what you mean as "good" for an engine. An engine in any car has moving parts and they operate on revolutions per minute (RPM). The engine at 3,000 RPM, for example, has no "knowledge" of the speed of the car. The transmission does the job of moving the wheels to go at the speed selected by the operator. There is nothing "good" nor "bad" as to speed related to the engine. The next subject is the workload the entire vehicle is doing. A car going up on a grade of 5% with near at the maximum payload at the required RPM to generate the speed demanded by the operator will definitely work harder than on a downhill grade of level road. Driving at speeds over 60 MPH, one mile per minute, is an incredible waste of time and dangerous and beyond unsafe. The operator of the Audi TT learned the hard way as to reckless high speed driving. He died. Any speed in the Category 1 hurricane level force winds is damaging in so many ways. Car bearings, suspension, cooling systems, exhaust, etc. are more taxed as the speed of the vehicle increases past 45 MPH. I recommend you do not drive at these speeds. The miles per gallon is in the single digits due to the aerodynamic forces. Control can be iffy, at best, and no doubt, you, as the majority of the drivers in the planet, have not received special training to be qualified. If you wish to learn more as to driving, please enroll in an advanced driving school. Otherwise, the photo is all of the evidence I need to present to you to affirm my recommendation that you are NOT to be driving past 60 MPH no matter what the rest of the drivers are doing without training. For more photos got to "wreckedexotics.com."



The car/engine has 183,000 miles on it I would ease up. Cruising speeds are better then stop and go. Your chances of something failing or breaking is a lot higher on a car with high mileage going that fast. Slow down.

Dear friend rivving the engine for high rpm is not recommended. driving at low rpm also harms the engine life. Normally any vehicle has to be driven between 3500 to 4000 rpm. Then it consumes correct fuel. driving at constant rpm improves the life of the engine. Drving the vehicle at higher rpms reduce the life of the engines.

It's actually good for the engine. Start and stop in huge traffic is bad for the engines.

Yes it's better than stop and go traffic. 80 or 85 should get you a primo ticket. With the mileage you have on your car, I would think you should give it a break. They only last so long.

Nothing to do with how fast you're going more to do with how many revs you're pushing.

A constant 85mph for an hour or so in top gear at 3500rpm will do no harm.

55mph for 5 minutes red lining the rev counter could do great harm.

It's better than being stuck in gridlock in that stop and go traffic, that's what kills your engine. You are putting more wear and tear on the parts inside your engine and without regular proper maintenance those parts will give out sooner than had you not gone so fast.

Quicker, constant highway speeds are the EASIEST on the engine and motor oil providing the coolant is full as well as the engine oil.

Just make sure to keep checking your fluids!!

Lets say im driving 80 or 85 on the highway with little or no traffic. Some people say its bad for the engine but others say its good for the engine. Im kinda confused between the two. My engine has 183,xxx miles on it. So what do you master mechanics or petrolheads or anyone think? Be honest and thanks