5W40 in Toyota V6 which recommends 5W30?

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No Problem!! You will be pleased!! IF you thought that engine was quite and smooth before!!! Just you wait!!!
 
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Any problems with this? SUV is out of warranty and I thought that the Delvac 5W-40 would be a good way to try and prevent sludge build up in this engine which is know to get dirty. Will using a deisel oil or 5W40 oil hurt the engine?
 
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Could this useage of a heavier viscosity oil lead to premature oil pump wear?
 
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With a jump of only one weight grade, I very much doubt it. If he was jumping to a 50 or 60 weight, I would worry about that, but not a 40. If it were me, I'd just listen very carefully for any increased valvetrain noise. If the engine was quieter overall, I would expect it to be fine.
 
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quote:
Originally posted by Alan: Could this useage of a heavier viscosity oil lead to premature oil pump wear?
They are both a 5W, so it would not make one iota of difference. A heavier viscosity oil would be a 15W-40 or a 20W-50. If they are both 5W-xx, they are both thin oils. IMHO. Dave
 
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