2000Stanglover

I have a high mileage car and i have been useing castrol gtx high mileage oil. I was wondering if it is ok the to use synthetic oil on my car.

My car has 170k on it. thnx

mustangman02232

waste of money

RyansQuick6

The only thing it will hurt is your wallet, the only thing it will help is the oil company.

2000Stanglover

Ok thnx just wanted to know because oil change is comeing up soon like tomarrow. Oh another question, I have been useing 10w40 in the car we are suppose to use 5w40 right?
Should i go 5w40? sry i'm still new at this and my run fine with 10w40 in it.

RyansQuick6

5w20 is what's recommended

fordforlife0225

synthetic is not that much more expensive. i think it is quakerstate has a sale this month like 4.99 a qt for their synthetic.

i run mobil 1 5w-20 and i pick it up at the wal-mart for like 22 bucks for a 5qt jug. and then just pick up a long life oil filter and you wont have to change your oil for 5-7 thousand miles. i feel like the extra engine protection is worth the 5 or 6 bucks extra.

mobil one also offers there "clean 5000" oil which is NON-synthetic and is not a synthetic bled. it is simple conventional oil which is good for 5000 miles.

stangant

i run castrol syntec on mine not much of a difference, just what i prefer.

Matt's 95 Stang

^ Same with me. I use it for the added protection and it doesnt cost me that much more at the local Walmart so it doesnt bother me.

Matthew

RyansQuick6

I run Motorcraft 5w20 and a motorcraft filter, it cost me less than $15 for an oil change. When I pulled my heads at 118k miles the honing marks in the cylinders looked brand new. I was also able to clean my heads with a paper towel, no sludge buildup or anything

sIx

Motorcraft FTW.

My car has had Motorcraft oil and filter its whole life, but I switched to Royal Purple with a Motorcraft filter just for kicks and giggles, but I still change it at 5k miles.

I would think 10-40 its kinda thick, but if that's what you have been using...?