Is my ford focus safe using high milage full synthetic oil?
So i own a 2005 ford focus zx4 se and i recently changed my oil. My vehicle has roughly 170,000 miles on it and it calls for 5/20 but i noticed that it would be low on oil from most likely evaporation brcause my car doesn't have a leak. So i used 5/30 mobil 1 high milage full synthetic. I noticed that its filled a lil more than the max on the dipstick, it reaches up to where there's a curved dent in the dipstick if you know what i'm talking about. But is that oil ok for my car and is it bad that its overfilled? I only poured an entire 5 quart jug which is how much my car is suppose to take to my knowledge. Any help is appreciated!
The oil is a thicker viscosity, but it's okay if it leaks and it's for a higher mileage engine. I would NOT recommend filling it up past the full line because it can seep into your spark plugs and flood them, and that will end up making your car preform awfully.
Read your owners manual
Thicker weight for higher mileage is good. Over filling is bad, but less than half a quart over filled is ok.
Depending on engine, it takes 4 to 4.5 quarts. Do not put in 5 quarts in the future.
Yes. Safe.
5W-30 is NOT recommended. Anybody who says it is, doesn't understand how variable valve timing works. Using a heavier viscosity can screw up that mechanism and set a check engine light. Go back to 5W-20. Read article below. And overfilling if very bad. Crankshaft whips air into it and causes foam. Foam doesn't cool and can cause damage
http://ricksfreeautorepairadvice.com/motor-oil-viscosity-warning/
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