is it ok to put 10w 40 in a 15w 40 car?

Question

is it ok to put 10w 40 in a 15w 40 car?

(both part synthetic oils)

also to save money could i blent say 1l of 0w 40 fully synthetic and 4l of 10w 40 reguler to save money on part synthetic oils?

Answer 1

It doesn't really matter, don't go below 10-30 or above 20-50, you might try the blended, it's the best of both worlds and priced in between. Mobil 1 is good and moderately priced

the main thing is to change it regularly between 3k and 4k miles

Answer 2

Generally speaking, the 5w and 0W were engineered for those terribly cold northern states and regions. I suspect that since they had good luck with these oils for many years they said, "Hey, why don't we run them in all regions?"

What they discovered is that there was less labor on the oil pump and this saves horsepower for that lead foot and energy conservation. The other side of the W is the amount of anti-wear additives in the oil. A 10W40 has 30% more anti wear additives and is common in motorcycles that run at high RPM's and and may be air cooled and over the road trucks that have constant heavy stress on the crankshaft and bearings.

So long as a vehicle is engineered at tolerances that will accept a higher or lower number then virtually any motor can be run safely on any weight oil. The thing that destroys the oil is sheer (the piston rings thrashing against the cylinder walls at supersonic speeds) and by products of the combustions cylce that becoem suspended in the oil. New oil will not melt your shoes but used oil will melt the rubber soles on your shoes becausue one of the by-products of combustion is sulfuric acid.

Oil salvage is a process in which they boil the oil to remove the water or moisture content and then filter it to remove metals and other junk and this oil is then mixed with diesel and sold as heating oil. The chemical composition of the oil is forever changed but some guys will take this recycled oil and run their cars on it. And obviously this is a combination of all grades and weights of oil mixed up with old transmission fluid and gear oils and power steering fluids.

Good Luck!

Answer 3

The manufacturer may have recommended 15-40, but that's an unusual formula, and unless it's a very expensive specialty car, the engine will run fine with any standard grade of oil, even the single weight like 40. The first number designates its winter function (that's the W). Your engine will run fine on 10w-40. You can check with the car dealer to be sure.

Answer 4

Don't waste your money - regular oil (like Valvoline) works just find for a well-built engine while for a poorly built engine no synthetic will help. After all, most engines burn some oil so extended service interval is a gimmick - it really doesn't matter which oil has burnt out!

Answer 5

Use Mobil 10W40 HD High Detergent. 15W 40 is just winter oil, it is thin when cold, you can mix just about any oil but synthetics. Personally I would never use synthetic oil when Mobil HD is available! You can't do any better than that oil!

Answer 6

This is really crazy do not even think of doing that non-sense the manufacturer knows why they recommend the type of oil..... dont go screwing up your motor by doing that crap... just put what the manufacturer says to put in it always;;;;

Answer 7

10 40 dont bother as its more for lawn mowers rather than cars stick with recomendation

Answer 8

yes.

no.