1991 Z28

Which oil is better, Red line or Royal Purple?

rideon1200

Royal purple of course. 9 hp in a bottle. I added 10 bottles to my LG4, now I should have 230 hp.

Homer

iTrader: (1)

The best oil is the one you can afford to change every 3000 miles. Buy cheap, change often is what I say.

subliminal

iTrader: (1)

Royal purple, I saw a study done of all the oils. Royal purple offered the best protection out of them all.

UnderCover89TBI

iTrader: (25)

Royal purple

Homer

iTrader: (1)

Do you remember where you saw the study? I'd like to read it.
Thanks

1991CamaroRslow

iTrader: (3)

www.bobistheoilguy.com and Amsoil to answer your question. I'll never in my life use a Royal Purple product, nor will I use expensive transmission fluid. If you want good protection for a good price run Rotella T and a Wix or Purolator filter and change the oil every 3 to 5 thousand miles depending on how you drive/how the oil looks.

subliminal

iTrader: (1)

the study was on bobistheoilguy. They tested a bunch of oils dyno and synthetic and out of all of them royal purple was the oil that gave the least amount of wear.

scorchmaster

iTrader: (6)

Redline gear lube turns into jello if you let it sit, I wouldn't trust their oil either. Royal Purple works great

arenateam

RP

85Iroc-Z

iTrader: (4)

Royal Purple

pinky93

iTrader: (2)

Is Mobil 1 not good?? I have used in my Harley, every Chevrolet I have ever owned. Hell, even my lawn mower has Mobil 1. I will change if convinced though.....

subliminal

iTrader: (1)

From what I have heard Mobil 1 isnt as good as it used to be. They changed their formula or something.

89Nighthawk

However I do use Mobil 1 Tranny fluid because I run a high stall and I like to rev it high in low gear and it really heats up the tranny and the sythetic ATF holds up much better.

1991CamaroRslow

iTrader: (3)

Mobil 1 now uses grade 3 stock instead of the grade 4. I searched BITOG for the Royal Purple test and didn't find it but that's not to say it isn't true. I've seen a few local horror stories about Royal Purple and call it superstition but I'll stick with Amsoil. Has anyone had experience with Torco oil? This seems like a really serious company that doesn't get alot of coverage, I can't find much about them.

Camaro355Z28

definetly royal purple. the guys on HorsePower TV used royal purple motor oil, differential oil, tranny fluid and the purple ice coolant additive and gained a dynoed, like 11-13 (could have been more, was a while ago) horsepower on an LS1 powered Camaro...

markymarco

iTrader: (10)

I <3 royal purple

nelapse

iTrader: (17)

I am a believer of Amsoil, or Mobil 1

1991CamaroRslow

iTrader: (3)

For the price you pay, Mobil 1 can't be beat for synthetics. With the new oil standards though you're probably better to throw some Delo, or Rotella T in your car. Rotella T makes a 5 W 40 synthetic that I've seen oil analysis of and the stuff holds up unreal. Diesel oils are exempt from the new stringant emissions standards therefore they still contain the additives that actually help your engine (think Zinc and Manganese). I'de like to see a comparison of the Rotella 5W40 vs. Mobil 1. I'de say the Rotella will edge it out simply for the fact they're a similar grade oil and Rotella is still on the diesel standard.

186irocz

Royal purple for me now, i never did before when i rebuild my trans i noticed a crazzy difference in it, so i changed all the fliuds in my gn. I swear with just the purple i gained 10 hp! Its such an amazing oil. But very pricy. Cost me 140 just for the trans.

nelapse

iTrader: (17)

I have seen dyno results with royal purple. You get like 9 or so HP, but you need it in your engine, your transmission, your rear axle. You are talking way over a $100 in fluid alone. For 10 Hp....

For you people that say you gained 10 HP from just an engine oil change you are mistaken. You need to change everything with it. Most people think they are gaining alot from the seat of their pants but in reality I wouldn't be surprised if they gained 2 hp.

SilentBobZ28

iTrader: (5)

I've ran AMS Oil in everything from 2 stroke dirtbikes, to methanol powered racing carts, to 4x4 trucks, to Rail cars and have never lost an engine yet. They have a great variety of oils depending on what your application is.

87-4MULA

Im Amsoil all the way. my whole car is amsoil everything from engine oil, to diff, to trans and grease. thats the only thing ive ever run and i love it. putting the stuff in just gives a better ride and feel for the car in my opinion, as well as a bit more hp and mileage

86FireBird305

is it ok to use synthetic on an old engine (140k+)

tompumped

iTrader: (3)

I heard amsoil was the first synthetic, so i'd trust them. But I don't know anything about synthetics. I never heard of the redline gear oil turning to jello, but I will take your word for it. I'm going to buy royal purple gear oil.

five7kid

iTrader: (14)

It really pains me to see threads like this that are so devoid of criteria and facts.

Things such as which product within each brand, what engine you'd be using it in, what the vehicle is used for, etc., etc., etc., are missing from the beginning. The responses are pretty much based on hearsay and emotions; even the bobistheoilguy link doesn't get directly to the answer.

In their information, do companies compare what they offer to like competitor products? AMSOIL is the only company I know of that does. That speaks volumes to me.

I would be comfortable using any appropriate Mobil 1, Redline, Royal Purple, or AMSOIL product without worrying about which is "better". Any will be better than a 3000 mile petroleum based oil from Kmart or any of the majors (same difference, actually).

86FireBird305

u really bring up some good points....but is there at least a difference in oils like castrol gtx high mileage cuz thats what i use....its supposed to condition seals better to prevent leaks etc.

I H8 WWD

iTrader: (5)

Has anyone ever seen the RP company. Its looks like its government ran. All white coats, clean rooms with access coded doors everywhere. Its awesome and I think that says something about their product.. I wish I remembered what TV Show I was watching when they went inside Royal Purples company. Also they have special steps (that many other oil companies never talk about) that they cant show....not even the room they do it in either. All together I think RP is the best because of their highly government look of work and proven gains. Other than that choose what you can offord....for me, protection has no VALUE. I buy the best.....I think Lol.

RP ALL THE WAY!

nelapse

iTrader: (17)

I have seen a quaker state commercial and a castrol commercial with dudes in white coats, if that is what it takes to suck you in then god help you.

Not sure what criteria you use to decide what is best, because something is first they are the best? Wasn't ford the first mass producing automobile company? Are they the best?

Take people's words with a grain of salt, because someone tells you it's the best doesnt mean it is. People have been using generic products since cars were created, I gaurantee you if you change it when you are suppose to you will be fine.

87-4MULA

there is no problem with switching to sythetic after alot of miles. however, amsoil recommends runnig a bottle of their engine flush first thru the engine. This breaks down the sludge and deposits that build up in the engine. essentially all you do is put on a new filter, pour a bottle of the stuff in and run the car at a high idle for about 15 min. drain all the junk out. then just pour the new oil in. they recommend this b/c you dont want all the old contaminats in your oil. But this is a good idea for everyone to use every couple of thousands of miles.

don't quote me on this but ive heard of running ATF(automatic trans fluid) in your engine for a short period of time to clean it out. ATF is a highly refined oil and has solvents in it to help break down the stuff you dont want. I havent done it but this is what ive heard of some people doing.

tompumped

iTrader: (3)

Where did I say it was the best, and I don't trust anyone, but for four dollars more i'll buy royal purple. I said i'd trust them, only because I watched a video about the company a couple years ago, not because they were the first. If your going to be an jerk off why not keep to yourself. I do agree with what you said to I H8 RWD, but come on.
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I heard the same for ATF from an old timer, but I never tried it.

nelapse

iTrader: (17)

Any more comments you'd like to share?

I H8 WWD

iTrader: (5)

Yeah....read ALL THESE. Then give me some to backup your oil...I guess.

http://www.royalpurple.com/techrp/summary.html

pinky93

iTrader: (2)

I am getting reaady to install the ProCharger, so I am definitely going to move from Mobil 1 to one of these three.... Amsoil, RP or Redline. I guess I will just keep reading this thread to see how I proceed.

I H8 WWD

iTrader: (5)

ITS I H8 WWD....WRONG WHEEL DRIVE. I LOVE REAR WHEEL DRIVE. Lol.

1991CamaroRslow

iTrader: (3)

The molocules in synthetic oil are all uniform in size (or at least MUCH closer than dino oil). When you start to run synthetic in high mile engines don't be surprised if you start spouting oil leaks as it works out all of the places where the old oil had built up. If your car doesn't leak oil now then you will probably be ok, if you have small leaks, the synthetic will find its way out of them way better than the regular oil did.

I H8 WWD

iTrader: (5)

Hey thats good info becuase I have an intake manifold leak and was about to change my oil to RP. Maybe I should replace the gasket before I do my E-Check. Thanks alot.

86camarokid

actually atf is good for alot of stuff like unsticking valves and lifters... try it some time when you get one that tics like crazy, also makes good R/C shock oil hahah

tompumped

iTrader: (3)

My mistake I thought it was RWD.
I heard from more than one person that it will leak worse if you have a leak, but I don't know for sure, i'd like to know if it's true.
The only thing i'd be wary of is flushing an engine with high mileage. You could develop a noise that wasn't there before. I don't know if it's true, but I heard it from the same person that said you can use ATF as a flush.

I H8 WWD

iTrader: (5)

Might be something to Test & Tune???¿¿¿

freestylzz

UnderCover89TBI

iTrader: (25)

u can use atf to flush..i wouldnt swithc to a synthetic on a higher mileage engine

186irocz

For the royal purple in all my drive train it cost me over 200 dollars. But was well worth it! I noticed a big difference, so i did my duramax chevy my gn, and my nova. I changed the rear trans and engine. Also there rad cool works geat 2! Lowerd my engine temp 15 degrees.

freestylzz

I've been told this aswell. I haven't experienced this as I flush my engine on all my vehicles regularly. I believe if you don't flush your engine regularly when it's still fresh the internals are forced to work in a certain way over time (because of the buildup). Clean it out and your left with clearances the internals have to deal with now that the internal "gunk" is all cleaned out (essentially loose internals which need adjusting / replacing, thus the "noise/s").

186irocz

Change your oil every 3000 miles or 3 months, and u dont have to worry about engine build up. And run good fuel. I took my friends 305 apart when we put the 350 in his f body, it was always run on good fuel and oil was kept up. The thing looked brand new! The pistons where even clean.

tompumped

iTrader: (3)

Freestylzz that was how it was explained to me, it's just been years since I heard it. I never ran a flush in any car I had. I might start with the new motor.

Zepher

iTrader: (1)

I run Valvoline VR-1 20/50 oil and it's been working great for my high milage LB9. 180K miles and still has 40psi of pressure and puts down 195RWHP (car is rated at 195 at the flywheel).

rideon1200

while involved in Goldwing I learned about MMO. I will put a bottle in and run about 20 miles to flush before oil change, also add some to my gas. Keeps everything clean.

StreetRoc85 350

i use mobil 1 religiously. its def the best that you can buy off the shelf. (wal-mart sells it for like $23 for 5qts!) ive had very good luck with it. it makes a little difference in gas mileage and a little difference in power. not night and day, but enough to keep me happy. ive used it on all my thirdgens. my 'bird had 160k on the clock and never leaked a drop when i switched to synthetic.

honestly, i think there is a HUGE difference between regular oil and synthetic. but the difference between one synthetic and another isnt as big. if i was running a blower or a couple of hair-dryers on my motor and had some serious $$$ invested in it then i would use royal purple or amsoil or any of the "high end" oils. but for now, mobil 1 does the job quite nicely!

buy whatever you can afford as long as its synthetic. whats the point on spending $X on oil if you can only afford to change it once every three years? many many thirdgens are running regular synthetic oil and have over 200k on the odometer and are still ticking. just keep up to date with your oil changes, thats the most important factor

86FireBird305

How about Castrol GTX High Mileage... who else besides me in here uses that?