Which oil do you prefer?

[v6mustang01]

Interesting thing happened today at the gas pumps in Chambersburg pa. I was filling up my f-150($52 worth) and an Amsoil representative confronted me while he was pumping gas into his grand prix. He asked which oil i used in my truck and what weight. I use Royal purple 10w-30. He also handed me a gas additive called King Super NT gas additive 890. I was wondering what everyone thought on the 2 oils...Amsoil and Royal Purple and what does everyone else use? Also has anyone heard of the King Super NT gas additive 890? The manufacturer is in Hagerstown, Md. Which is only 50 miles from my house. Its suppose to clean the deposits like any other gas treatment but the guys said this was way better stuff.( i know they all say that but my trucks got 107,000miles on it) and it was free so i figured what the heck. In a 100miles your suppose to "feel" the difference so ill know on my way home from work whether or not it works.

[speedracer]

I use Mobil1, I might use Amsoil if there was a local dealer and it was available in 5w20.

[v6mustang01]

I got a card for this guy. perf-lube.com. He seemed like a very willing/honest guy. i think im goin to get a case of oil from him.

[SonofaBish]

Wait, i'm not trying to be rude at all, but you run Royal Purple through your F-150??


Over all the forums i have seen billions of oil threads... I've come across a bunch of studies on the best oils out there, and Royal Purple, Amsoil, and Shell Rotella Synthetic are always the best ones... only difference is, Shell Rotella Syn is less than half the price of the others.... only problem is its only available in 15w-40, which numerically makes it thicker than Ford recomments for anything...

I run the Shell Rotella Synthetic and absolutely love it... and i'm pretty sure my oil sees as much heat and torture as any other car.... However, it is thicker than recommended, so i don't run it in my Harley truck and just try to stick with the 5w20...

[Martin0660]

If you ever want ot get pretty well educated on oil, and have some time on your hands, spend some time on this site..........

http://www.bobistheoilguy.com/

TONS of great info there.

Bob Myers

[phillysrt4]

If you ever want ot get pretty well educated on oil, and have some time on your hands, spend some time on this site..........

http://www.bobistheoilguy.com/

TONS of great info there.

Bob Myers

x2 on that website!

I did a lot of reading on there a while ago, and the jist I got was when it comes to oil, dino is dino is dino and synthetic is synthetic is synthetic provided all oils in question are certified to the same grade standard.

[v6mustang01]

Yea i run the 10w-30 in my truck but im goin to switch to the 5w-30. I dont see the problem in running it either. Havent had any problems and ive run synthetic for 20,000+. I asked around on the forums and with the local ford dealer and they said i shouldnt have any problems. Just keep it changed every 6,000 or so depending on driving style. If you think there's a problem running it what do you suggest im always open for suggestions.
What do you suggest for my 2000 v6 mustang? i want to switch it over to royal purple also or amsoil?

[SonofaBish]

shit i dunno... i wasn't saying anything about the grade... i just can't believe you run oil that's $7+ a quart in your F-150 .... LOL... but w/e suits ur fancy man!

I'm sure no matter what way you go, that will be fine ... those are both top of the line oils

In my LT1 T/A, i always ran Shell Rotella T (which is the dino oil Shell Rotella) along with a bottle of Lucas Oil Stabilizer, and it was still kicking VERY strong with 178K miles

[mlowry1260]

Interesting thing happened today at the gas pumps in Chambersburg pa. I was filling up my f-150($52 worth) and an Amsoil representative confronted me while he was pumping gas into his grand prix. He asked which oil i used in my truck and what weight. I use Royal purple 10w-30. He also handed me a gas additive called King Super NT gas additive 890. I was wondering what everyone thought on the 2 oils...Amsoil and Royal Purple and what does everyone else use? Also has anyone heard of the King Super NT gas additive 890? The manufacturer is in Hagerstown, Md. Which is only 50 miles from my house. Its suppose to clean the deposits like any other gas treatment but the guys said this was way better stuff.( i know they all say that but my trucks got 107,000miles on it) and it was free so i figured what the heck. In a 100miles your suppose to "feel" the difference so ill know on my way home from work whether or not it works.

Call me a skeptic but, why would a buy motor oil from someone/company that markets like Amway? Amsoil may be good stuff but, their marketing bothers me.

What mileage are you do oil changes at? What kind of commute do you have long or short?

I think there is good evidence out there showing the most of the benefits of synthetic can be gained by self blending 2 of the 5 quarts of oil during an oil change. It's not that full synthetic oil is bad, it's bang for the buck on a street car using a synthetic/mineral oil blend. If you were running a turbo & needed the enhanced properties of synthetic it would be a different story. There was a consumer reports oil study a few years ago where they did various mileage oil changes on a NYC taxi fleet. They were able to show no significant wear difference between 3000, 5000 & 7500 mile oil changes. It never hurts to go by the manual recommended oil change mileage.

The 3000 mile changes in the 60 & 70's cars was probably needed to looser engine tolerances and the use of carburetors. Our newer cars & trucks with EFI & tighter engine tolerances & better materials burn much cleaner. Therefore 3000 mile oil changes can and should be a thing of the past. I do long enough drives that my car & oil get fully warmed up therefore I can run up to 7500 miles on oil changes on my daily driver per the manual.

[2002LXSport]

Royal Purple 5w20 in the Vic (also RP gear lube in the back)

Mobil 1 20w50 in the quad (Pep Boys didn't have Royal Purple in this weight)

Pennzoil 5w20 dino juice in the fiance's Mariner cause she puts a lot more miles on it than I do in the Vic

[v6mustang01]

My commute to work everyday is 80miles round trip through basically back roads. Up mountains, windy roads and interstate when i go visit the gf after work. Last oil change on the truck i ran 8,000miles. Yea the oil was dark but nothing to bad. I figured id run 7000 miles on this oil change and see what it looks like. I use to always run castrol gtx until i heard nothing but bad things about it. Im just trying to get the best protection/bang for the buck and squeeze out a few extra hp/mpg. I like the royal purple stuff and i wont switch to amsoil but just was curious what everyone else thought. $7 a quart is a good deal of money to pay out for an oil change but i just drove past the ford dealer the other day and they wanted sumthing like 29.95 for a 5quart oil change and lube. Thats ridiculous. SO i figured if i spent 45 and did it myself and used the oil of my choice it was well worth the 15 extra dollars. I dont smoke so splurge sumwhere else...y not on my FORD!

[badf250]

I'm running Amsoil 5W30 with AMsoil filter in my superduty. i change it every 3000 miles. My work is only a 1 mile drive from my house, so the truck really doesn't warm up, and It takes me at least 6 months to put 3000 miles on it. The Motorcraft 5W20 completely sucked for me. It was really black and thin come 3000 miles.

I used castrol GTX 10W30 in the stang, but a bunch leaked out ( i did fix the leak) so I used some 15W40 Mobil delo diesle oil to refill (2qts worth) no problems yet.

[Rodeheaver's]

I'm running Amsoil 5W30 with AMsoil filter in my superduty. i change it every 3000 miles. My work is only a 1 mile drive from my house, so the truck really doesn't warm up, and It takes me at least 6 months to put 3000 miles on it. The Motorcraft 5W20 completely sucked for me. It was really black and thin come 3000 miles.

I used castrol GTX 10W30 in the stang, but a bunch leaked out ( i did fix the leak) so I used some 15W40 Mobil delo diesle oil to refill (2qts worth) no problems yet.

Let me add this note, yes rotella is to thick for mod motors, the yhave tighter clearences, the lightest weight availible is 15-40, so its perfect for pushrod engines but just about all mod motors say 5or10-30 on the cap, check out these pics from last week, this is my buddies 4.0 explorer, this thing get babyed, he changes the oil like clockwork, but guess what he use..... oh my... synthetic, i try to tell people but i have seen this more than a few times, and it has me scared to go near the stuff, now i have to tear it down and clean it all out and add a new crank kit and bearings and oil pump...

[mlowry1260]

Let me add this note, yes rotella is to thick for mod motors, the yhave tighter clearences, the lightest weight availible is 15-40, so its perfect for pushrod engines but just about all mod motors say 5or10-30 on the cap, check out these pics from last week, this is my buddies 4.0 explorer, this thing get babyed, he changes the oil like clockwork, but guess what he use..... oh my... synthetic, i try to tell people but i have seen this more than a few times, and it has me scared to go near the stuff, now i have to tear it down and clean it all out and add a new crank kit and bearings and oil pump...

Tim,

I don't think you can draw any conclusions from one or two engines like this.

Synthetics are proven to work by well researched car manufacturers, Porsche, Ferrari, & the new Corvettes to name a few. I don't think they are always the best choice used straight in older vehicles. It's been proven that a 1 or 2 quarts combined with regular oil give the majority of the benefits of straight synthetic use. The blended oils often only use 15% synthetic. As you stated, newer motors like the mod & LSX motors run tighter clearances and this is where the synthetics work very well.

[Rodeheaver's]

Tim,

I don't think you can draw any conclusions from one or two engines like this.

Synthetics are proven to work by well researched car manufacturers, Porsche, Ferrari, & the new Corvettes to name a few. I don't think they are always the best choice used straight in older vehicles. It's been proven that a 1 or 2 quarts combined with regular oil give the majority of the benefits of straight synthetic use. The blended oils often only use 15% synthetic. As you stated, newer motors like the mod & LSX motors run tighter clearances and this is where the synthetics work very well.

I know where you are coming from, but my problem is that I have seen people use both and have seen more problems from synthetic, thats all i am saying, I was on the phone with comp cams a few months ago and we were talking about engine and cam break in periods, they fully recommended to use Diesel oil for cam break in, and i was like, "diesel oil" and they insisted for me to use diesel oil for cam break in.. And i have had great luck with rotella considering i have built alot of motors and Never had one come apart, (other than my own, due to my own stupidity), I pulled my small block car down a couple years ago because i melted the top corner of a piston slightly and had to replace it, well I bought new bearings and pump to put in while it was apart, and the bearings in the motor looked like the day i put them in!!! I tell you what i just believe in that oil... Nothing will change my mind, it has proven itself time and time again..

[SonofaBish]

Actually, Rotella T Synthetic is a 5w40 now.... its in Walmart ... just FYI

[Rodeheaver's]

Actually, Rotella T Synthetic is a 5w40 now.... its in Walmart ... just FYI

oh yah, thanks

[gmkillr]

Actually, Rotella T Synthetic is a 5w40 now.... its in Walmart ... just FYI

The Rotella they sell now isnt nearly as good as the old stuff. The reason for Rotella being considered a good oil was for its zinc additive. Rotella no longer produces their oil with the zinc additive, so its just regular plain oil now.
There was a good thread over on Hardcore5.0 about this and all of the big dogs chimmed in and confirmed this.