my 2001 QX4 almost turn to 118k miles .
I'm using the Mobile one 5w-30 now, my friend told me that on the engine with high mileage should use thicker oil.
He suggest me switch to 10w-30. actually, I heard that before. But, is it true?
should I switch to 10w-30 now?
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Towncivilian
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Re: should I switch to 10w-30 now?
Is it consuming more oil at this point? If not, stick with the same weight oil. If your temps are above 0 degrees Celsius, you can use 10W-30/40 per the owner's manual.
I've read on BITOG that the VQ engines are hard on oil and shear 5W-30 down to 5W-20-ish after a few thousand miles, and these engines prefer thicker weight oils, or at least a 5W-30 that's on the thicker side (read here). I am going to try 10W-30 or 10W-40 for my next oil change (maybe even an API-certified HDEO [diesel oil] which I've read are good cleaning oils and can lower oil consumption).
I've read on BITOG that the VQ engines are hard on oil and shear 5W-30 down to 5W-20-ish after a few thousand miles, and these engines prefer thicker weight oils, or at least a 5W-30 that's on the thicker side (read here). I am going to try 10W-30 or 10W-40 for my next oil change (maybe even an API-certified HDEO [diesel oil] which I've read are good cleaning oils and can lower oil consumption).
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m0nkeyprince
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Re: should I switch to 10w-30 now?
agreed, dont switch unless your engine is eating up mor than normal amounts of oil
Thicker oil on older engines work on the assumption that older engines have leaky seals and that a thicker oil would slow down those leaks. That aint a solution, cause youre changing the weight of the oil just to prolong the amount of time you need to check the oil levels.
Stick with 5w-30, and if you really are worried about leaky seals, just check the oil levels more often and top off (which i doubt you will need to)
Thicker oil on older engines work on the assumption that older engines have leaky seals and that a thicker oil would slow down those leaks. That aint a solution, cause youre changing the weight of the oil just to prolong the amount of time you need to check the oil levels.
Stick with 5w-30, and if you really are worried about leaky seals, just check the oil levels more often and top off (which i doubt you will need to)
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Chuck Tribolet
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Re: should I switch to 10w-30 now?
5W30 will give better gas mileage than 10W40, in general.
That said, I run 10W40 because it helps keep the P1110/P1135 camshaft advance codes away.
That said, I run 10W40 because it helps keep the P1110/P1135 camshaft advance codes away.
Re: should I switch to 10w-30 now?
No need to switch -- the oil is doing its job. Manufacturers often list different oils that will work properly in an engine.
Remember a 5-30 is a 30w when it is warm. The only time you would want to move to a heaver oil is if you have a leak or the thinner oil is leaking past the rings when the engine is cold and smoking on start up -- obviously you should fix the leak. The 5-30 will give you better gas milage as the engine warms up on a lot of short trips.
We have used the high miles oils in a couple of out fleet cars that have over 200k -- just to try them out. The oil worked great on an older DOHC ford V6 that had very light valve noise -- quieted it right down. But I would not change unless you are having some issue
Remember a 5-30 is a 30w when it is warm. The only time you would want to move to a heaver oil is if you have a leak or the thinner oil is leaking past the rings when the engine is cold and smoking on start up -- obviously you should fix the leak. The 5-30 will give you better gas milage as the engine warms up on a lot of short trips.
We have used the high miles oils in a couple of out fleet cars that have over 200k -- just to try them out. The oil worked great on an older DOHC ford V6 that had very light valve noise -- quieted it right down. But I would not change unless you are having some issue