C.J. Roberts
TJ Addict
Kind of going the other way with this, what's it going to HURT using a blend as long as it's high mileage?
Finally changed to "high mileage" oil
- Thread starter WestCoastDan
- Start date
James9100
TJ Enthusiast
It certainly doesn’t “hurt” to use a full synthetic, blend, or conventional haha.
I guess the idea is that it would have the potential to start leaks sooner than a straight conventional.
I put full synthetic Castrol Edge high mileage in and immediately got lifter tick until the temp got to a full 210. Drove it for several hundred miles and it never got better. Switched yesterday to Conventional Castrol GTX and it only ticks at startup. Give it a couple of days and I expect it to go away completely. Needless to say my 4.0 hates synthetic.
Jeeps sitting at 88k miles currently and likes to mark its territory. Based on age would it be best to start in on high mileage oil or just stick with conventional?
It's time to start running a High Mileage.
It couldn't hurt to try a high mileage conventional.
Alright, you’re killing me. This is a slap to the forehead response, ha.
High Mileag Conventional oil….is what I’ve been using on my 05 TJ and it has helped immensely.
I could use hardened sludge in my 08 JK and it would leak a quart a week, MFER argh! Ha
I was getting a different kind, but I went into OReilly and they have a High Mileage Conventional. I'm sure it's manufactured by someone for them, not sure whom. I have also used Napa that had one.
I haven't, but on my CJ5 V8 304, they all say "Zinc, get the ones with Zinc" over and over with the flat tappet cam, ha. I've not heard that with the TJ 4.0, probably because it doesn't have a flat tappet.
Can't hurt (famous last words), but I hate that Amazon doesn't say conventional, and frankly their descriptions aren't always accurate on that. It doesn't say synthetic or blend, that "used" to mean it's conventional.
I decided to use this Pennzoil High-Mileage conventional oil (red label) simply because it was the cheapest of the 'any reputable oil maker' recommendation and it fits the simple wisdom that Jerry mentions of using high mileage additives, etc.
As far as whether this product is synthetic blend or not. There are bottles that say synthetic blend, right next to it is this one that just says motor oil. I would figure if it was a synthetic oil Pennzoil would want to advertise that to help swoon the passing customer, whom largely believe synthetic is superior cuz mo' powa'.
As far as whether this product is synthetic blend or not. There are bottles that say synthetic blend, right next to it is this one that just says motor oil. I would figure if it was a synthetic oil Pennzoil would want to advertise that to help swoon the passing customer, whom largely believe synthetic is superior cuz mo' powa'.
LONGJP2
TJ Expert