40 Weight Oil
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40 Weight Oil
A rebuilt engine in my '89 Bronco II is less than a year old but burning a quart of oil every 450 miles. The garage said 15-40 weight oil would solve the problem but I wonder if this is only a bandaid to get them past the warranty period. Any advice on whether heavier oil is the solution.
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40 Weight Oil
I have a similar situation on an '89 Bronco II, add about 1 qt every 500 miles or so, varies a little, depending on whether highway or city driving. I have always used 10W-40, on old engine and different rebuilt engine. Old engine used very little oil. I asked the shop if this was normal oil consumption on a rebuild, and they said it was not out of the ordinary since the cylinder walls are honed out larger on a rebuild, and allows more clearance for the oil to pass. They did not perform the rebuild, only installation, so they would not have a real reason to try and pass it off through the warranty period, which is 75,000 miles or 3 years.
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Joined: Mar 2001
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From: So Cal
40 Weight Oil
Maybe the cylinder walls have been honed or bored out but a GOOD rebuild will also include appropriate sized pistons and rings. So the excuse used by the shop is bogus.
A good rebuilt engine should not burn more than a quart in every 1,000 miles, actually should be more like 2-3,000miles. But a brand new rebuild may burn oil a bit until the engine seats itself, should take a couple thousand(at worst) or so for this to happen. If you are burning oil (1qt per 500) after say putting 3,000 on the engine, something ain't right. Of course you should also have followed the recommended break in procedure, if you didn't, that might be the cause.
I have read that some auto manufacturers consider burning oil at 1qt per 1,000 as "acceptable" but a bit on the high side of usage.
I think you may have a sloppy rebuild on your hands(But I am no expert). But depending on the warranty, you may be stuck with the problem unless you can show bad cylinder compression or other typical oil burning causes. You might also check to make sure you don't just have a leak.
Good Luck,
Jim Henderson
A good rebuilt engine should not burn more than a quart in every 1,000 miles, actually should be more like 2-3,000miles. But a brand new rebuild may burn oil a bit until the engine seats itself, should take a couple thousand(at worst) or so for this to happen. If you are burning oil (1qt per 500) after say putting 3,000 on the engine, something ain't right. Of course you should also have followed the recommended break in procedure, if you didn't, that might be the cause.
I have read that some auto manufacturers consider burning oil at 1qt per 1,000 as "acceptable" but a bit on the high side of usage.
I think you may have a sloppy rebuild on your hands(But I am no expert). But depending on the warranty, you may be stuck with the problem unless you can show bad cylinder compression or other typical oil burning causes. You might also check to make sure you don't just have a leak.
Good Luck,
Jim Henderson
