2004 Toyota Tundra

Asked by Apr 14, 2016 at 02:56 PM about the 2004 Toyota Tundra 4 Dr SR5 V8 4WD Crew Cab SB

Question type: Maintenance & Repair

I have always put fully synthetic oil in my truck. And
i took it to get a oil change and I told them what to
put and they put non synthetic oil in it and now it
blows white smoke out the exhaust. So i parked it
and haven't drove it. How can i fix it?

6 Answers

26,055

drail and replace with the synthetic... its ok to upgrade fro conventional oil to synthetic but not the other way around...

You dont think the engine is blown?

246,175

Switching between Synthetic and regular will not harm the engine IMO if it was the same weight. White smoke means your burning coolant, the head gasket might have failed on you. Do a cylinder pressure test.

49,145

Did the crankcase get overfilled with oil? That would cause smoke. Switching between regular and synthetic oil will hurt nothing.

No it didnt overfill but it went from fully synthetic to non synthetic. That wont hurt it?

49,145

As long as the oil was the same grade (weight) as the synthetic there is NO WAY you would be able to tell the difference. It will not hurt anything. If it wasn't way overfilled you have other issues going on.

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