I want to run a thicker oil but…

[Starving Electrician]

I have had engine run their entire lives on 5w-30 when speced 0w-20 I just moved to 10w-40 in my neighbors 350K Tahoe that's burning about 1 quart every 1.5k. 3 runs of VRP didnt help so I imagine the rings are just worn not stuck.

You will be fine going to 10w-30 or 5w-30.

 

[alcyon]

When you said thick I thought 20W-50...then you said 10W-30. Going from 5W-20 to 10W-30 is "nothing"

 

[SubieRubyRoo]

I bought a truck with 250k to use as a farm truck. It doesn’t leak oil and it doesn’t smoke but it’s using a quart of oil every 500 or so miles. I’m considering running a thicker oil to see if it slows consumption but I’ve seen so many oil experts online that say to not go heavier than the manufacturer recommended viscosity. It’s a 2004 F150 5.4L and the factory recommends 5w20. Twenty weight isn’t very thick. Would it be unspeakable to use good old 10w30?

Anyone who tells you that you can’t run a 30 grade in any engine that has a lower grade recommended by the manufacturer isn’t an “oil expert”, period.

 

[kschachn]

Anyone who tells you that you can’t run a 30 grade in any engine that has a lower grade recommended by the manufacturer isn’t an “oil expert”, period.

But you can’t have a thick vs. thin thread without that.

 

[KEVINK0000]

All my RX8s get 20w-50 and Mazda only recommends 5w-20 for all climates and usage patterns. (US owners manual).

Will my Incorrect Viscosity Trophy be sent to me, or do I pick up personally at the awards ceremony?

OP, my .02 is run VRP 5w30 for the recommended time (5 changes I believe) and reassess. If consumption is still high, go thick and don’t worry about it at all. 40 or even 50 multigrade.

Also ditch the usage of AI search engine results. They are hilariously bad, especially lately.