JLTD

The other day I was tooling around the internet and saw where some driving the 5.0 are using 5w30 oil instead of the 5w20, apparently with no ill effects. This was in both the F150 and Mustang.

Has anyone on here used a 5w30 oil in the Coyote engine, and did you notice any difference?

(for those that don't know, owner's manual says 5w20 for all conditions)

Thanks in advance.

mechanicboy

I used motorcraft synblend 5w-20 until I put the blower on at which point I swapped to 5w-30 Pennzoil Platinum. I've had no problems so far and feel with the extra heat from the blower I made a good choice. However, youngerone ran 5w-20 down in the Texas heat with the same blower and never had a problem. Let me tell you what, he beats the crap out of his vehicles so 5w-20 can't be that bad.

Snowflake

Fords been using 5w20 I'm most of there engines since 2001. Mostly for fuel economy. 4.0L and ecoboost are the only gas engine I think they recommend 5w30 in. While your under warranty stick with the right weight after that put what please you.

PawPaw

The newer modular type engines have closer tolerances then the older design's and usually need a lighter viscosity oil. I ran MC Syn blend 5W-20 in my 5.4 and the 5.0 powered truck's I've had with great result's...running 5W-30 in the Ecoboost I have now.

jgiddy

The 5W20 is more for CAFE requirements. And I thought Ford recommends 5w30 for some of the Mustang GT 5.0s and 5W50 for some of the special editions? There's no logical reason why 5w30 would cause a problem in our 5.0s and I would think it would quiet down the tick a little bit.

Also wouldn't a 5W20 synthetic blend be very close in thickness to a 5W30 full synthetic?

mechanicboy

All 5.0 mustangs use 5w-20 except the track pack edition which use 5-50

And No, it being a synthetic or regular shouldn't affect viscosity.

Fx4_5.0Man

iTrader: (1)

A track pack edition gt has nothing different internally in the engine on a 2011+ 5.0, so the use of 5-50 is suited for a track usage I would imagine. I have a 1997 Mustang and the original engine called for 5w-30. I swapped in a 2004 Gt engine that was PI 4.6 and it magically called for 5w-20..I run 5w-30 in it with a vortech, works great.

I would recommend 5w-30, but knowing ford and warranty, you should probably just stick with 5w-20. If your boosted, I guess warranty isn't a concern so I would run 5w-30. lol

MPETE

iTrader: (1)

5w20 is fine for any conditions.
Roush still recommends 5w20 in mustangs and trucks after installing a super charger. I dont see any reason to switch from that

zx12-iowa

I would use 5/20 winter and 5/30 summer.

B52 Jetman

I would use what the owners manual tells you to use. You have nothing to gain using a different weight oil...the 5.0 is engineered to use 5-20, then that's what I'd use.