crocop

this is going to be pretty n00b for me to ask this but since this is my first 5.0 i thought i should ask. its about engine oil. my car has 200 000 km on it, is it ok to run synthetic or should i just put regular oil in. i herd that if i put synthetic in i could get leaks through the seals. what kind of oil should i run. i need to know the viscosity and also whats a good oil to use. thanks

crocop

anyone please

primetime5.0

use valvoline max life oil, I run 10w40 myself

dman302

after that many miles it really doesn't matter..I would run 10w40 and enjoy every mile you have left

crocop

?! why you think the car might crap out on me soon. its in kilometers not miles thats like a 120 000 km difference. hold lonf would a 5.0 last then ?

DIMMER

Well the deal with synthetic is it has a high detergent content and if you do have leaks witch would be pluged with dino oil/crap it will clean it out. Syn is not bad to switch to you can do it at any mileage but if you do get leaks its cause it did what it was spose to do. Clean the system. See your oil cleans your motor to a point and your filter catches what it cleans. Same with dino or syn. But i will tell you a old redneck trick pour about 1/3 bottle of brake fluid in your oil if you have leaks and it will swell up your rubber seals. ( IT WILL NOT HURT YOUR MOTOR) But just a cheap fix till you can get seals replaced. (My lil brother has a 94 transam lt1and switched to syn it had 130k miles well long storie short it leaked like hell we put 1/3 bottle of brake fluid in his oil took about a week to stop leaking completely and its been perfect for 6 monthes now.) Everyone here should know that old trick so I say switch cause its better oil if you do get a leak through some brake fluid in it if you cant repair right away. Rember brake fluid is only a temp fix seals should be replaced as soon as you can IF you get a leak. hope this helps. Ohh btw i have 82k on my truck andstarted sysn @ 75k no problems at all. My stang i just switched to sys 168k miles no new leaks just the drivers valve cover witch has been leaking foever lol.

rmodel65

ive got almost 200 thousdsand miles on my 5.0 no reailibilty problems that are major other than a new set of o2 and plugs,cap and rotor

johnjr45

i use mobil one 10w30 synthetic

nitrous_bob

don't believe the hype

absolutely use synthetic , i like 15w50 , some say no, but the heavier oil helps w/ the looser motor

i also have 120k on mine

if your worried use 10w30 , but full synthetic, don't waste your money on blends.

the mpg , and increased interval pays for itself, virtually no engine wear is just a bonus

Mustangkiler

either synthetic or convential, theres no inbetween, its just priced up regular oil when it comes to blends.