I was wondering if you guys with high mileage trucks add anything to your oil after an oil change? I just changed mine a few days ago and I'm using the Pennzoil high mileage oil. Would adding anything to it help with lubrication or just be a waste of money and possibly make things worse? I've seen things on the market like, motor up, slick 50, duralube, etc. Are these all ripoffs or can they actually be helpful? Thanks.

 

If I were you I wouldn't worry about it. Just keep your oil changes regular. I dont see any need to add anything to your oil.

 

OK, thanks. Just wanted to make sure since I have a lot of miles on my truck. Wasn't sure if it would help or hurt things. I have to say that it's a good feeling to change your own oil and pull that dipstick out and see very clean oil on it. I hate to admit this but this was the first time I ever changed the oil on a vehicle. I always just took my vehicles to the quick lube places since it was convenient. Since it's cheaper to do it yourself, that's what I'll be doing from now on.

 

The only thing that I would ever put in oil is Auto Rx

 

I just mobil 1 synthetic, it's slicker than eel snot.

 

Aftermarket engine oil additives just aren't neeed & may indeed upset our lubes synergy, or at best maybe do no harm!!!!
The high mileage recipe lube your using has been carefully formulated to do it's advertised thing & doesn't need any aftermarket help.

Here is a thread with a link to some interesting reading on snake oils & if you poke around there, you'll find a "long term oil study" of several different brands, with UOA data, which may prove interesting!!!
https://www.ford-trucks.com/foums/39...nake-oils.html
Edit: 2nd attempt to fix url https://www.ford-trucks.com/forums/3...nake-oils.html

 

There's alot of oil additives that advertise better mpg. The way I see it, if this was true, the auto manufactures would allready be using it in thier cars to reach the govermant mandates, also better mpg is allways more attractive to the buying custumer. More people would buy a ranger if it got lets say, 32 mpg instead of 29 on the highway. Most of this stuff is snake oil, however, I'm sure some of it is on the up and up, I've heard good things about Z-max for cars that use conventional oil, but running synthetic oil does the same thing as Z-max. I noticed some of the auto manufactures are starting to put synthetic oil in some of thier cars now. Since oil is a throw away product after the first few thousand miles, they figure why spend the extra money at the factory level, Although some are starting to use it at the factory level. I know vetts and vipers get synthetic and ford uses motorcraft which is a synthetic blend.

 

Wendell, click on the second corrected url I posted above, for a snake oil link & scroll down toward the bottom of a long list of successful legal actions that the govt has taken against these aftermarket additive companies & yes ZMax is in there.

The legal proceedings show it's mostly a colored mineral oil that'll help INCREASE wear by 50%!!!!!
Not exactally such a wonderful claim to fame lol

Lots of other snake oils there too, like SOPUS/QuakerState Slick50, DuraLube, Prolong, Castrol & Shell's PEP addtive, Valvolene's additive, ect, ect, none of which could prove their advertised claims in court!!!!!

Seeing as how these aftermarket additives DON'T have to under go ANY API service grade testing, or for that matter any synergy testing, to see if they'll mix with whatever lubricant we pour it into, without causing problems with whats already in our fully formulated lubes & the fact that those aftrmarket additives recipe can change at any time, along with the recipe of our fully formulated lubes, how can we be sure we're out guessing our lube manufacturers engineers, who spend a lifetime at their profession????

Nope I don't think so, why not consider choosing a lube manufacturer that has earned & has a known good reputation,( that hasn't been taken to court to prove their product doesn't work) & stick with them!!!!!

At least their upper managment & marketing folks are honest enough to make claims they can back up with published tests!!!!

More snake oil thoughts for pondering.

 

Yeah, I just use top notch synthetic oils, largely for their ability to extend the oil change intervals. Any brand name oil will be good, with the possible exception of quacker state.

 

I use a heavier wieght. higher mileage vehicles should be using a heavier oil.

 

Not from what I'e found. Only and engine with excessively high wear should use a heavy weight oil. Plus heavy weight oils reduce fuel economy and aggravate lubrication problems. The only advantages to heavy weight oils is that it remains on the moving parts longer after the engine is shut off, and it is more resistant to working its way past seals. Synthetics address the first, and are just as good as regular oils at the second. Besides, no oil will fix a worn out seal.