i just got my new 01 mustang with the 3.8 its got 120k miles on it, and i dont know what the previous owner used oil wise, im going to change the oil for good measure, is 120k miles too much to switch to synthetic? if not should i break it in with a mixture of synthetic and regular then go synthetic after that change? thoughts? opinions? discuss amongst yourselves. thanks for any help in advance.

 

no to much mile for synthetic oil just use reg oil

 

If the engine is fine now, switching to a good synthetic (Amsoil, Royal Purple, etc.)is still a good thing. If the engine is leaking or burns oil, keep with the cheap crap.

Don't believe the myth that synthetics with higher mileage engines is a bad thing.

 

it doesnt leak, and it doesnt burn oil (the car was from out in the sticks so its all highway miles) so your saying i should be fine huh?

 

Yeah it came out of the factory with mobile1 5w20 in it for a 3.8 liter so id stay with what it calls for because now adays the bearing talerences are alot tighter then they used to be so your gonna need a thinner oil but at the same time you need the protection. i recomend either Amsiol (because im a amsiol dealer) or mobile 1.
do not put royal purple in any of your vehicles. I am not a beliver in royal purple. for one it has graphite in it. and 2 they say it polishes your bearings. think about that one. you really want your bearings polished. not me i want them protected not looking good lol.

 

Stick with Mobil synthetic, never had a oil related problem / breakdownwith this oil in any of the 7 cars I have owned including mystreet/strip 66 ranchero I've had for ever,cost a little more butnot likedoes parts and labor

 

I have always heard it is ok to switch from regular oil to a sythetic, but not ok to switch the other way. I dont know for sure and have seen no research for this claim. However, I run Mobil 1 synthetic in mine.