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View Full Version : How much power does a car lose over time?


EvaUnitAammar
12-19-2009, 09:20 PM
I've always heard that cars lose power over time. Surely it makes sense, a 5+ year old car will probably have lost some power...but does anyone know exactly how MUCH power it loses?

Anyone have reliable links? Hopefully some of the car gurus know

I'm guessing maybe 1-5% of its overall output for lets say 100 k miles?

tommewin
12-20-2009, 10:37 AM
I'm sure it's going to depend on driving conditions and driving styles. There's too many factors to really come up with anything useful IMO.

mastratus
12-20-2009, 10:38 AM
My Prelude seems to run like new and it has 300k on it.

Compression tested it and it checked out great.

I think it's all in the maintenance... :P

CZero
12-21-2009, 06:44 PM
Every year it loses 0.056%^15/3.367 hp on top of every X*1.357(t-0.97) miles drive.
Where x = miles driven and t = % tire tread left

mikesrex
12-21-2009, 07:35 PM
my CRX makes more power every time I put it on the dyno!

al
12-22-2009, 08:45 AM
Just keep it maintained. Some cars will make more power as mileage accumulates due to friction and lubricated surfaces being broken in, thus changing tolerances.

As you get into high mileage, though, loose tolerances will start to hurt performance, as the cylinder loses compression and oil starts to seep where it shouldn't.

Carbon buildup and oil passage blockages are internal problems that can alter performance, but those problems are typically engine specific.

Basic maintenance items like spark plugs, air filters, proper oil, properly tensioned accessory belts, timing chain tensioners, etc can affect engine performance slightly.

DC
12-22-2009, 08:49 AM
Just keep it maintained. Some cars will make more power as mileage accumulates due to friction and lubricated surfaces being broken in, thus changing tolerances.

As you get into high mileage, though, loose tolerances will start to hurt performance, as the cylinder loses compression and oil starts to seep where it shouldn't.

Carbon buildup and oil passage blockages are internal problems that can alter performance, but those problems are typically engine specific.

Basic maintenance items like spark plugs, air filters, proper oil, properly tensioned accessory belts, timing chain tensioners, etc can affect engine performance slightly.

werd.

joeg
01-09-2010, 10:01 AM
I agree. Maintenance is key. NY Mr2 has 150k on it and compression test is great.

spoooolin
01-11-2010, 09:58 AM
There is no set formula.

Corrosive
01-11-2010, 10:23 AM
I am sure your 2012 Chrysler Bankrupt is doing just fine... dont worry about it until at least 2014

Supra Turbo
01-27-2010, 01:55 PM
It all depends on the car really.. If its a Honda then it loses most of its hp in the first 24 hours of life.. and its tq within the first 12 hours.. all depends...

al
01-27-2010, 01:59 PM
If it's a Honda, you lose all HP and torque to thieves