Why Do Cars Lose BHP Over The Years? - Page 2

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    #11
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    Quote Originally Posted by petrolmarty View Post
    Not sure that's strictly true, cars nowadays are much better built. Anyone here in their 50's will remember having to decoke heads and rebuild carburettors on a regular basis. 100,000 miles was unheard of without a rebuild. Due to better build quality and engineering, plus better lubricants 250,000 is now the norm.
    All cars lose BHP due to increased tolerances but probably only 10% if looked after well.
    Most 1970s cars were good for 100 - 150K no problem but I must admit to have a lot less practice taking heads off due to head gasket failure where it seems as a whole with alloy heads and stretch bolts the results of overheating seem to be worse than they did with cast iron engines that only needed a skim if horrendously baked.

    It has been a very long time since I've had to lap in valves though, in fact I think last time is the 1988 cast iron engine in my Manta that was designed in the '60s and had done 200K miles since, so about 250K in total


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    #12
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    Mercs, Horrid looking cars that really dont do it for me. I think I see far more old BMW's on the road than I do old Mercs. Surely this says something for the quality between the them!

    I am maintaining my car so it hopefully lasts for up to 200,000 miles at that point i'll give up with it and get a different BMW.

    What are the key maintainance points when trying to get maximun life from a BMW?

    Regular Oil changes
    Regular Air filter Chances
    Regular Inspection for rust
    Regular Washing and polishing

    What else?
     
     

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    #13
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    Quote Originally Posted by Dez-Derek View Post
    Mercs?
    Their engines might last but the rest of the body will be a pile of rust.......
     
     

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    #14
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    Quote Originally Posted by terry54661 View Post
    Mercs, Horrid looking cars that really dont do it for me. I think I see far more old BMW's on the road than I do old Mercs. Surely this says something for the quality between the them!

    I am maintaining my car so it hopefully lasts for up to 200,000 miles at that point i'll give up with it and get a different BMW.

    What are the key maintainance points when trying to get maximun life from a BMW?

    Regular Oil changes
    Regular Air filter Chances
    Regular Inspection for rust
    Regular Washing and polishing

    What else?

    Oil service is good for engine life, air filter change is good for economy.

    At the end of the day it also depends who is doing it. One loose sump plug or missing sealing washer and it's all over.


    In some ways, as cars get older more often frequent checks are the big life saver, like noticing coolant regularly needs topping leading to replacing a weeping water pump before it gets baked in traffic or fails catastrophically, or checking oil between services, it's never too late to get a new leak but it can be too late to top up the oil.


    Also are you asking from the point of view of economics? Depending how much you do or tolerate yourself depends on what is best to do.


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    cam lobe wear,build up of shit on the inlet tract and exhaust system aswell
     
     

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    #16
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    Not sure about here in the UK as a lot of people prefer brand new cars, but if you go to South Africa. They have loads of old mercs there. We had a green early 70s merc W115 model ourselves. You'd definitely see more older merc than any other cars there. Then you'd get loads of e30, e34, e36s and VW Chico golf (Like the shape of the original golf but more modernized)

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    Quote Originally Posted by Dez-Derek View Post
    Not sure about here in the UK as a lot of people prefer brand new cars, but if you go to South Africa. They have loads of old mercs there. We had a green early 70s merc W115 model ourselves. You'd definitely see more older merc than any other cars there. Then you'd get loads of e30, e34, e36s and VW Chico golf (Like the shape of the original golf but more modernized)
    Different climate in SA-Transvaal/Free State cars last longer cause they don't rust like they do here cause its dry and people have garages to park their cars.However in Durbs cars rust to pieces in no time
     
     

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    If your looking after your car I doubt you'll notice a drop in performance until you get into mega milage, when boar wear, piston rings and valve/seats actually start deteriorating.

    I had my car on a rolling road early last year, had 162.5k on the clock and was making nearly 6bhp more than standard
     
     

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    #19
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    Oh my word! You know South Africa? I was from Durbz!! And they only rusted if you lived right by the beach salty air, etc

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    Quote Originally Posted by Dez-Derek View Post
    Oh my word! You know South Africa? I was from Durbz!! And they only rusted if you lived right by the beach salty air, etc
    You could have it rust treated which worked quite well however the life span of a car is longer in the Highveld and cars hold their value much better. 2nd hand cars are expensive there. I was in Durb about 6 weeks ago-its my hometown-well Amanzimtoti is
     
     

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