Date: Tue, 05 Jan 1999 01:17:35 -0800 From: Paul Grimshaw <Paul_Grimshawnopsamympatico.ca> Subject: Re: Any 300K miles engine around? Need real data...
Brett, Excellent point wrt oil volume in today's engines. I have noticed that some manufacturers have very large sumps (especially Porsche with dry sump recovery tanks and BMW with their well-engineered power plants), whereas others are exccedingly small. On a displacement basis, the European cars tend to have larger sumps, thereby placing less thermal and chemical stress on each molecule of oil. Then there's oil temp..... another reason why every one of my cars (regardless of type) will always be fitted with a thermostatically-controlled engine oil cooler. No, I don't tow things ;-) Again, many thanks for excellent points from a BMW Master Tech. Paul Grimshaw Brett Anderson wrote: > > \> Points taken, but what does oil changing have to do with > >pinging/pre-detonation? Thats _usually_ a timing issue, or a buildup > >of carbon on the valves. Neither have anything to do with oil. And I > >will be the first to admit, I dont have facts/stats in front of me, > >but Im willing to bet that most emmissions failures of cars have > >NOTHING to do with lack of oil changes. > > Not true, a lack of oil changes can cause build up around the rings. > Eventually the rings become seized into the grooves and you suffer from blow > by. Blow by effectively blows out the spark, causing poor fuel burn and > higher tail pipe emissions. > > As for the longevity of small engines vs large, I think you'll find that it > is better related as Other vs American. > > American engines, up until the late 80's at least, are very poorly designed > junk, not designed to do more than 100K miles, and a surprise when they do > do more. > European and Asian engines, however, are generally much better designed, > including lubrication systems, and so last longer. > > FWIW, most 5 litre GM V8's use 5 qts of oil. A BMW V8 uses 8 qts. The > added oil volume increases it's cooling and cleaning abiliity. There should > be no reason for an Alusil BMW V8 to not run in excess of 300k miles. > > Brett Anderson > BMW and ASE master technician > http://frontpage.bestweb.net/~bretta > > Visit my web site to reply via email > > > > > > >Paul Grimshaw <Paul_Grimshawnopsamympatico.ca> wrote: > > > >>There's a bit difference between the lubrication requirements with a > >>big, lazy, low compression V-8 than with smaller, higher revving engines > >>that produce as much power with 2 litres of displacement that the Chevy > >>305 does with almost 5 litres. Add to that the fact that main bearing > >>diameters of most engines is being reduced in a quest for shorter, more > >>compact engines and there is a compelling case for maintaining good > lubrication. > >> > >>Oil is one of the cheapest forms of life insurance for an engine. > >>Engines may not explode in a shower of sparks these days, but observe > >>how many on these usenets complain of poor power, pinging or emissions > >>system failure. Each of these people will spend money and time > >>correcting a problem that could have been avoided. > >> > >>Paul Grimshaw > >> > >> > >>****************************************************** > >>As Reviewed in EuropeanCar Magazine! "The Volvo > >>Performance Handbook" is the Latest in Literature > >>for your Swedish car! Check out this and other > >>publications at: > >>http://www3.bc.sympatico.ca/Volvo_Books/ > >>****************************************************** > >> > >>temp32nopsamail.com wrote: > >>> > >>> If this aint a post that supports the 10,000 mile plus engine oil > >>> changes, I dont know what is. All you 2500 mile change interval guys > >>> are a bot over the edge. How many cars do you know if that die of > >>> blown engines these days anyways?? > >>> > >>> Tino <lazarofnopsam.com> wrote: > >>> > >>> >Thats not bad, we had an '81 Chev Impala in the family (ugly thing > wouldnt die) > >>> >that hit 412,000 !!!! before we had it towed away. No one will believe > this but > >>> >it was stock motor with no rebuild, stock auto tranny even. Heater and > brakes > >>> >and gas tank and things like that replace but motor and tranny > original. The > >>> >carb had to be rebuilt again as well. > >>> > > >>> >It was really not a well maintained car. The oil was changed every > 10000 miles > >>> >or so. It ran rough but never died. The reason it was towed was that > one very > >>> >cold winter morning, someone got in the car and did not want to wait > until the > >>> >motor was warm (it used to stall if you just put it in drive). They > reved the > >>> >motor and put it in gear. As soon as it went it gear, it broke the rear > end (it > >>> >probably had no oil) and of course the car was not really worth fixing > anymore. > >>> >Just had it towed away but the engine and tranny never died. > >>> > > >>> >Yossarian wrote: > >>> > > >>> >> JOHN SHENG <injnopsamus> wrote in message > news:74tjqv$ja8nopsam.csus.edu... > >>> >> > > >>> >> > Any 300,000 miles engine around with slightly minor engine work > >>> >> >or no engine work? Tell us how you accomplish that. Name the > >>> >> >engine work(s) had been done and mileage. In general, how > >>> >> >much an engine overhaul/rebuilt costs? For which brand car? > >>> >> >Where to get the new engine parts? > >>> >> I've got an '87 Ford F-150 closing in on 200k miles. No engine work, > that I > >>> >> know of (I'll have to check with the previous owner, my grandfather), > but > >>> >> the A/C is shot, got a new transmission at 160k miles, and the > heater's not > >>> >> working (temp. control is stuck or something - easy fix supposedly, > but I > >>> >> haven't had the time to take it to my mechanic). About time for a > brake job, > >>> >> too. Problem - not much fun to drive. > >>> > > >> > >>-- > > -- ****************************************************** As Reviewed in EuropeanCar Magazine! "The Volvo Performance Handbook" is the Latest in Literature for your Swedish car! Check out this and other publications at: http://www3.bc.sympatico.ca/Volvo_Books/ ******************************************************
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