I LIVE IN SOUTHERN CALIFornia where its hot most of the time ,just wondering would it be ok to run a 5w-30wt oil rather than 5w-20 wt ? i read it 5w-30 should only be used in the 3.7 V6 I have a 2008 4.2 V6 EB With 62K

 

Your engine could use either really, but knowing a 5w20 has a higher HT/HS and most 5w30 oils shear to 5w20 what's the point? The 3.7 engine didn't exist in your year of truck and for reference your 4.2 is not a EB.

 

ok its not eco boost ?

 

Just run whatever the manual says.

 

Yes you can run 5w30 without problem. Only reason Ford even went to 5w20 in many of the engines was to try and squeeze a tiny bit of mpg out. You are doing no favors to the engine running 5w20 over a 5w30. Ford actually has been transitioning many engines back to 5w30.

 

Do you see turbos? The EcoBoost started in 2011 model year F150 trucks.

 

ok thank you im just learning , to change the subject ,i did own a 390, and it was a great motor , just ate the gas , drove it to Alaska and i always luved that truck 1976 F250