goharv

Had to do my 18,000 mile change today, so I ran down to Advanced Auto and picked up some Mobil 1 Syn oil and a MotoCraft filter. Well I put it in and then realized that I was thinking of my other car when I grabbed the oil. I put in 5w-30 instead of 5w-20. If I remember right the second number is the high temp viscosity so I am thinking I will be fine. I live in central TN so the temps are only up in the 60's now and in the 30's at night. Should I drop out the oil, or am I fine for another 3k until my next change? thanks

ps. Tried to search, but the function isn't working too good right now.

Bmr4life

Switch it back out, thats only about $35 in oil.

thewarmachine

You're fine. If you're worried, just change it out after about 5000 miles. Engines are robust, and a small change like that makes no difference.

Ford_Dude

switch it out
at operating temp the oil won't be able to reach all the little places that need oil

Nuke

Too bad you can't do a "transfusion" to your other car...

Not too sure about running the 5W-30 in the Stang... I've heard different stories. Change it if you want the piece-of-mind.

hammeron

might as well make this a poll


flip a coin

heads, it'll be fine
tails, better switch it out or your engine will blow

04 40th gt

I think you will be fine. I just did an oil change on mine today, and the oil that came out was 5w-30. I used it last cause it was on sale. 5x-20 was on sale this time. I had no issues. The engine ran fine.

Nuke

Knowing the forum, the coin will land on it's side...

Ford_Dude

no I think the coin would split in two and both would be on their side and they'd roll off lol

hammeron