currently im running Redline Synthetic 10W-30 in the crankcase of my 02 with 26K miles on it. im also running Royal Purple 75W-90 GL5 in the rear differential. i was thinking about gettin Royal Purple synthetic 10W-30 motor oil, but i was told that it has some sort of additive for resurfacing bearings in it. how true is this? also. i stock Royal Purple and i can have Redline overnight. availability is not an issue, neither is price, i get 20% off of each of these oils. im just looking for quality and best protection. i run the car hard quite often. im looking for the best.

 

From what I have learned from reading the oil journals here, Amsoil beats every thing. Lurking over at "bob is the oil guy" website, redline gets a higher approval rating. Plus hanging around at the race track, all I see is redline oil. All this is subjective, mind you. I would use redilne. A lot of S2ks run LE 607 in the diff. Its a true 90w gear lube. I never heard that about RP, so I dont know.

 

Redline

 

I personally use Amsoil, and all the imperical data that I've seen shows that Amsoil is every bit as good as Redline. Why did I choose Amsoil over Redline then? Price. It's that simple. Additionally, Amsoil offers longer drain intervals than any other oil available. Redline and Amsoil are formulated differently - Redline has gone the way of a more expensive formulation. Redline is a good oil and would be my second choice if Amsoil was unavailable for some reason.
I use Redline's SI-1 fuel treatment. It is the best fuel treatment available.

Royal Purple is garbage - simple as that. I had a very bad oil related failure in another vehicle, and RP did not cover the damage. I would get rid of the RP in your diff as well.

If you have any damage to your vehicle that's oil related (as in the oil failed in some way - not an owner induced oil failure) - Amsoil will cover it. Think of it as insurance - even though I've never heard of a single instance of an oil related failure with Amsoil - and it was the first synthetic oil for automobiles marketed in the U.S. That's a long service record that can't be matched by any other synthetic oil manufacturer. Amsoil was the first oil to offer extended drain intervals - and that was decades ago.

If you were to choose between Redline and Royal Purple - that's choice is all too easy - REDLINE.
If you were to ask between Redline and Amsoil - I'd say save yourself some cash and go with Amsoil.

 

Bob has some valid stuff on his site, however he uses it to market some off brand of oil, and some the tests he uses on his site to demonstrate the qualities of his product are pulled right from the bag of tricks used by traveling oil salesman of old.

There's a "bearing press" shown on his site that is supposed to demonstrate how his mystery oil is better than all the other oils available. This is the same device used by traveling oil salesman (like BG product salesman) to demonstrate the "strengths" of their product. The demonstration is set up with several products and the salesman challenges any in the crowd to bring him a product - and his oil will outperform it. Sure enough - his oil wins all challenges on this magical machine.
I went to one of these demonstrations (BG Products) set up by a sports car club I was a member of in College (Sports Car Club of Auburn). Sure enough, nothing was better than BG products. However, I quietly watched the BG salesman as he cleaned his bearing press following the demonstration, using brake degreaser - and low and behold there's apparently no product better for lubrication than brake degreaser (according to this bearing press demonstration).
I confronted him and made him power up his machine again so that I could see it with my own eyes again - and it showed that no matter how much force you could apply using the bearing press contraption, you couldn't score the bearing while it was covered in brake degreaser. Well, that proved it to me - brake degreaser was the answer to everyone's lubrication needs - I mean it beat out even the BG mans own product, so it has to be the best - right?
So should you go and dump brake degreaser in your engine based on this - of course not. What it showed is the apparatus was a gimmick.
I called Amsoil Tech Services to get the skinny on this contraption and they laughed and explained the device was a popular gimmick with all the "mystery oil" marketers, but didn't demonstrate any of the capabilities and functions of motor oil in an engine, or gear oil - lubricating diff gears or in a transmission.
There are industry-standardized tests for a reason - to demonstrate the properties of a product under controlled scientific scrutiny. "Bob" lost all credibility in my eyes when I saw he used the device to peddle his oil. I wouldn't use his product either for the same reason.
Every industry standardized test I've seen shows that Amsoil is the top - and is priced competitively with most of the popular synthetic oils. You can't beat that.

 

While you're draining the Redline on your next change, take a sample and send it in for a UOA with TBN. Then after a couple of fills of RP, do the same thing. That will help you decide which is a better oil for your car. If you're not satisfied, try some Amsoil with the same procedure. Have fun.

 

slipstream444 Posted on Apr 9 2007, 09:53 AM


Bob Is The Oil Guy or BITOG is a web forum with people talking about all kinds of oil.
There are very knowledgeable, independant people who post overthere and I've never seen any posts of people "pushing" any brand or type of oil.
First thing they would post if someone did try is : "Show us the VOA & UOA and send us a sample to back up your claim".
One of the sponsors of BITOG has written his own "Motor oil 101" and does back everything up by using what he's talking about.
Read all about that here:
http://63.240.161.99/motoroil/index.html
Maybe that will make you think again about using 10W-30.

 

My turn off to the site was the loosely veiled Schaefers propaganda ( http://www.bobistheoilguy.com/oilshear.htm ). The middle to the bottom of the page shows the contraption I discussed in my previous post above. Other demonstrations using other B.S. contraptions were used for Shaeffers gear oil.

I'm not saying there's not good info on the site - and not good discussion work by 'Bob' and others.

However, a lot of credibility was lost when I saw the traveling oil salesman tricks and pitch in order to push one of the site sponsors products - Schaeffers oil. There's a clever use of sound information in some of the discussions, and then they try to apply or tie these principles to bogus demonstrations on admitted "snake oil" machines (the Timken machine).
He states it can demonstrate barrier lubrication (exactly what the snake oil - BG guy - tried to claim) right after admitting it's a gadget used in B.S. demonstrations. The bottom line is it cannot demonstrate the function of barrier lubrication in an engine (or gearbox/diff). He blasts it several times and then uses it to try to prove a point - that's not science - that's B.S.

As I stated before in my previous post (and seeing it done with my own eyes), the best results found on the "Timken" machine (no real visible scar) was with Brake cleaner/degreaser! How much barrier lubrication do you think is provided by brake cleaner? Then he shows the splendid results accomplished with Schaeffers miracle oil. For note, he shows the competetive oil as Amsoil - which is the favorite oil used for comparison in this "snake oil test" (the BG guy had a quart of Amsoil 10W40 ready to go for his demonstration as well).

Once again, there is good information that can be gleaned from this site - but there's a lot of B.S. on it too.

 

Wow, good info to know. I currently have redline mt90 in the trans and redline 90w in the diff. No problems thus far.

 

i run RP, have for the last 10k and love it. i've noticed a quieter engine at idle, and alot less blow-by. i heard horror stories about almost all oil brands, i think its really comes down to a personal preference. i agree though that amsoil and redline are both great products.