I LOVE USING PENNZOILS WITH LUCAS !!, my car is 134k miles and been using pennzoils 10w/30 with lucas oils and it turn out to be best oils I had use. Stick with what work.

 

109k mobil1

 

43k kendall GT1

 

I dunno, just I heard forever from many people in the lube industry that pennzoil is crap and parafin based oil. Sure, itll last you a long time, but pull the motor apart, there will be crap and sludge EVERYWHERE, and lucas and pennzoil isnt as bad b/c lucas is good stuff

 

+1

Synthetic is just worlds above anything else out there. "high milage" oils generally are nothing more than a thicker oil to stop leakage, and mostly even then they are snake oil.

You don't have to worry about leaks and worn seals for a LONG time in a 4.6L if you use synthetic from the start and stop that wear. My car will never see anything but synthetic ever again, regardless of milage.

 

^+1

45k and on it's 2nd batch of RP 5W-20. I used Mobil-1 5W-20 before that. It hasn't seen anything else other than what the dealership used in the oil changes I had them perform prior to 20k.

I also don't know if it is wise but the RP website recommends waiting 12k between changes when using their product. I think they even guarantee the motor if a failure is proven as a result of their oil.

 

it'll go 12k before you need to change it

but there is nothing wrong with chaninging it our for clean oil every 3-5k.

 

what about using motorcraft 5w-20 symthetic blend?

 

synthetic blend? why bother...

 

i have 142k on mine i use quakerstate 5w-20 with lucas