truck just started puffing blue smoke
07-07-2008, 08:17 PM
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truck just started puffing blue smoke
so in the last two weeks my truck has been burning oil at start up.
just a puff of blue at start up but the exhaust smells different then usual even after the blue goes away.
any ideas on what might be causing it to suddenly burn oil like that.
the only thing i had done different is use a wix filter instead of fram when i changed oil a few weeks ago.
just a puff of blue at start up but the exhaust smells different then usual even after the blue goes away.
any ideas on what might be causing it to suddenly burn oil like that.
the only thing i had done different is use a wix filter instead of fram when i changed oil a few weeks ago.
07-07-2008, 10:15 PM
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5w-30 i was sort of thinking that with the hot weather we have been having here that 5w-30 could be a little thin but ive never had it happen before
07-08-2008, 07:33 AM
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A clogged PCV valve, maybe. Or, maybe a valve stem seal gave way.
Unusual exhaust smell? Does it smell like oil or sulfur???
Unusual exhaust smell? Does it smell like oil or sulfur???
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07-08-2008, 09:43 AM
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07-08-2008, 03:19 PM
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5-30 is WAY too thin for these engines, especially during the summer. They originally called for 20-50 until 1984 for so-called emission reasons. You should be at LEAST be using 10-30.
07-08-2008, 04:00 PM
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if it's not below freezing, there is no real reason to run a 5wXX oil. you can run a 15wXX oil down to freezing temps.
Smoking on startup implies either leaking valve seals or oil puddling in the intake. Thin oil will tend to become aerosolized more easily than thicker oil and could get more easily sucked into the intake through the PCV valve where it could stick to the intake and drip down to the valves when the engine is off.
Smoking on startup implies either leaking valve seals or oil puddling in the intake. Thin oil will tend to become aerosolized more easily than thicker oil and could get more easily sucked into the intake through the PCV valve where it could stick to the intake and drip down to the valves when the engine is off.
07-09-2008, 04:39 PM
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the motor can take a lot. you would typically choose the oil weight based on the temperatures the engine is operating in as well as the how much load the engine will be operating with.
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