Do BMW disel engines last longer than gas?
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Diesel engines generally last longer than gas versions based on the fact that diesel fuel has lubricating qualities. As such, cylinder and ring wear is substantially reduced. The bottom end, however, must be quite robust to handle the very high (22:1 typ.) compression ratio.
Martin
Martin
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Originally Posted by tomwid' date='Jun 21 2005, 03:19 PM
I meant compared to the massive tourque, but you're right 272hp isn't shabby!? It's a shame we don't get them here in the states.
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Originally Posted by BetterMakeWay' date='Jun 24 2005, 04:47 AM
I agree with fred. Plus the diesel vs gas engine ( @ simialar? power) most of the time would kill a gas engine on a highway or smth like that. I know this from my own experience. It like this many times: if the diesel has to overtake he only has to be on the right rpm to spool up the turbo and unleash the torque (wich is almost the whole rpm range) but the gas engine has to be revved hard to give performance, so overtaking for a gas engine could result in an engine brake first, just to rev the engine and move to a lower gear. So that is one of the reasons, maybe, the diesel outlasts the gas engine because of the revs. THE HIGHER THE REVS THE LESS LIFE THE ENGINE U'LL HAVE. at least thats my opinion.
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) and are designed to do that. If you spend your life at a permanent 5000 rpm its like me doing the same at 7000 rpm and I think we'd both shorten the lives of our engines..... Plus in the V8 we have a pretty wide torque band as well, not as wide as the 535d but then we don't have the turbos. I'm looking forward to getting a chance to take the twin turbo diesel for a spin when we finally get them in the US.
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Originally Posted by swajames' date='Jun 25 2005, 07:53 PM
[quote name='BetterMakeWay' date='Jun 24 2005, 04:47 AM']I agree with fred. Plus the diesel vs gas engine ( @ simialar? power) most of the time would kill a gas engine on a highway or smth like that. I know this from my own experience. It like this many times: if the diesel has to overtake he only has to be on the right rpm to spool up the turbo and unleash the torque (wich is almost the whole rpm range) but the gas engine has to be revved hard to give performance, so overtaking for a gas engine could result in an engine brake first, just to rev the engine and move to a lower gear. So that is one of the reasons, maybe, the diesel outlasts the gas engine because of the revs. THE HIGHER THE REVS THE LESS LIFE THE ENGINE U'LL HAVE. at least thats my opinion.
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) and are designed to do that. If you spend your life at a permanent 5000 rpm its like me doing the same at 7000 rpm and I think we'd both shorten the lives of our engines..... Plus in the V8 we have a pretty wide torque band as well, not as wide as the 535d but then we don't have the turbos. I'm looking forward to getting a chance to take the twin turbo diesel for a spin when we finally get them in the US.[snapback]143048[/snapback]
[/quote]You have a point there. But let's be serious how many diesel owners will red line their car to get performance and how many gas owner will do that? I bet the gas owners will red line the car much more often. I had a gas engine before and i knw i red line it just to get the juice out or even just to hear that UUUUAAH noize
.I for one couldn't stand to drive an m3 and shift @ 5000. The noize is just mindblowing in most of bmw gas engines. If u want to drive ur car hard (gas) u have to revv it hard, but in a diesel it's just enough to stay in the turbo range...and not in all diesels the turbo is present near red line,like in 535d. In most of the cases u NEED to shift way before redline because it's no point of getting to the redline because the turbo is gone and u don't get any result. So in most of the cases it's a must not to go even near to the redline in diesels.
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I think diesel engines will definetly outlast gas engines. The new bmw diesel engines have auto shutoff engines which is meant to reduce engine wear and tear when we drive really kick out torque.
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Originally Posted by redhat_man' date='Jun 26 2005, 06:45 AM
I think diesel engines will definetly outlast gas engines. The new bmw diesel engines have auto shutoff engines which is meant to reduce engine wear and tear when we drive really kick out torque.
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Thank you. Andrew
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