Finnally got around to changing my oil today (800 miles over due..... damn finals) After i got everything buttoned up, i was putting the oil jug in the trunk and noticed i picked up the wrong stuff.... i had grabbed 5w-20 insted of 5w-30... i had already started the engine and took it for a spin down the street (was fixing a few other things as well) and my oil light never came on and vtec enguaged normally... so is there any harm in running 5w-20 until the next oil change? or should i change it out with my next pay check?

 

If it were 10w30 I would say it's not a big deal. But 5w20 I'm not sure. The 20 is the viscosity that your engine will see 90% of the time you're driving and I'm not sure that's a good idea.

My fiances FG civic was 5w20, so I can only hope your engine would be okay but I don't know enough about oil viscosity to really tell you. tbh if you have to get some blended 5w30 for the time being and just change the oil.

 

Won't hurt a thing, no worries my man.

 

Your fine, even 1040 would kill it, if u said 2050 I'd be worried

 

My brother ran 20w50 in his B18C's all summer, they were boosted and ran hard with never a single problem. I wouldn't suggest it in your DD during a -10* winter tho...