Ok to mix 5w30 and 10w30 for an 4.7 Jeep?

[ensoniqman]

I'm on my 3rd Jeep in 30 years (2005 WK Grand Cherokee) and the mileage is 90k on the 4.7l Engine. Vehicle is new to me.

With summer coming up and OCI due around July, will it handle a mix 50/50 mix of 5w30 and 10w30 OK?

Temps where I live are 75-105 degrees in late summer.


(Previous engines on my other Jeeps were 4.0 (1991 Cherokee) and 2.4 GEMA on a 2008 Compass.)

 

[WobblyElvis]

Yes

 

[cheesepuffs2]

Absolutely, run with confidence.

 

[kschachn]

They are both 30-grade oils.

 

[CleanSump]

Yes.
However, the factory oil is no longer in it. Even if a dealership changed the oil, it's not the factory oil in it.

 

[ensoniqman]

BTW: I also have 4 new bottles of PYB in 10w40 that have been sitting on the shelf for 4 years.

Any harm in adding those to a 50/50 mix with the 5w30? Never tried it before.

 

[Greasymechtech]

You can mix whatever you want.

 

[ensoniqman]

Thanks guys!

 

[leadcounsel]

 

[Revving2Redline]

That's not because of all the different oil weights they're putting into it. That's more or less just because it's a Chrysler product.

 

[cheesepuffs2]

BTW: I also have 4 new bottles of PYB in 10w40 that have been sitting on the shelf for 4 years.

Any harm in adding those to a 50/50 mix with the 5w30? Never tried it before.

That'll be fine too. No issue at all, especially in your warmer weather.

 

[OilUzer]

Nothing wrong with 7.5W-30
Law says the mix is 10W.

---

 

[KCJeep]

The initial recommendation for 10w30 on the 4.7 was due to excessive shear with 5w30s when the engine was introduced. What it tells you is the manufacturer is concerned about too thin of oil in that engine.

Your 50/50 mix would be great actually.

 

[fantastic]

Create your own brew. Really mixing these 2 are no issue.

 

[53' Stude]

Create your own brew. Really mixing these 2 are no issue.

Been there done this. M1 0w40 “FS” SN rated with HPL 5w20 NO VII oil. Nothing bad happened

 

[fantastic]

Been there done this. M1 0w40 “FS” SN rated with HPL 5w20 NO VII oil. Nothing bad happened

Not to mention you kept cost down too.

 

[OilUzer]

Not to mention you kept cost down too.

If he drops HPL, he will really keeps the cost down. lol j/k

 

[fantastic]

If he drops HPL, he will really keeps the cost down. lol j/k

That is just way too darn funny!

I'm sure the No VI is good oil though & I'm sure that's why he's using it in the recipe. Maybe even planning on extending the miles on it. LOL