Royal Purple or Amsoil ??

X2....you and Manicmechanic are on the money !! If you'll study high end synthetics, they don't need zinc and other additives used in hydrocarbon based oils.

 

give that man his cigar,your right joecool,it was old kendall richie.........

 

"The green oil".....

 

I have always thought Rotella was for diesels only.I run it in my dodge trailer puller.

 

Both good. I know racers happy with either. Check into Valvoline part #VV-850. Has all the good stuff for flat tappet cams. NAPA has it or can order it. I back to backed it at the track against expensive 0w, go fast synthetic and pick up nothing with the big money oil. It says not street legal right on the the bottle. I tend to like stuff that says that. I break my engines in with Brad Penn and I run a LOT of valve spring pressure with a flat tappet.

 

this is a little weird, but there is a guy that works next to me that run Slick 50 pure, in a 51 F1. @ $15 bucks a pop thats little crazy. he can get it to idle down to 200-300rpm.

 

Valvoline VR-1 racing has the ZDDP content you want but I read it doesn't have sludge preventing additives.

 

100% BRAD PENN in the 56................ Castrol in the driver (92 chevy 1500)

 

When we switched from Valvoline to Bel-Ray in our Chevy van, which we used to haul the race car trailer with, we lowered the engine oil temperature with more than 10 degrees under full load. That's f)(%9ing impressive.

 

Can someone confirm this with a reference? Specifically, is ZDDP additive only necessary in dino oils, or do flat tappet engines benefit from it even with a synthetic oil? Thanks.

 

Amsoil produces a 10W-40 and a 20W-50 full synthetic, both under the marketing name of "Premium Protection" and in addition specify that they are high ZDDP content not intended for late model cars. These late models almost all have roller lifters anyway and don't need the high ZDDP content.And the compatibility issue dictates a lower ZDDP contemnt on vehicles with the newer catalytic converters..
They also produce 2 top line diesel oils. one has an additive package specifically for pre'07 diesel trucks and another for '07 and later. The pre'07 oil has an additive package incompatible with the particulate filter system in the '07 and later.
To my knowlwedge, they are the only major oil brand to maintain 2 premium oils for early and late diesel vehicles. The rest that I have checked have reduced ZDDP and other additives to be compatible with the late engines and only market that.
Problem with using diesel oil in gas powered engines, especially those modified for high rpm is that the slow turning diesels don't have as much of a problem with the oil foaming and the additive package reflects that lower need for anti-foaming additives. And oil foam doesn't lubricate bearings nearly as well as does oil! Inaddition you have the lower ZDDP issue to consider.
Racing oils are intended for racing and don't have to contend with catalytic converter issues so they all have high ZDDP. But in a true racing environment, they also don't have to deal with neglected oil changes or other sludging issues such as low temperature operation, so they reduce the detergent/dispersant additive content in favor of more antifoam , friction modifiers and just plain oil for better lubrication in a racing environment.
So really what it boils down to on a hot rod with flat tappets is a choice between a synthetic oil with a high ZDDP or a petroleum based oil with the same high ZDDP.
It's your choice, but extended drain interval with a good synthetic is also a consideratio.
Dave

 

My take on Amsoil is that the stuff is damn good. We run them in a fleet of CrownVic police vehicles that run 24/7 and get flogged hard every day, way harder than any of our hotrods get driven. We've run Amsoil about 4 years now, with a 10000-12000 oil change interval and run the cars to around 125-150000 miles. Never a single engine failure with it.....I'm sold.

 

Make you a bet Willy, catch a sample of that oil you're draining in a clean container. Send it off for a lab ****ysis and you'll find in almost all cases that you've been pouring out perfectly good oil!
Amsoil or it's equivalent in another brand synthetic (if there is one!), used in an engine of sound condition with a good oil filter will go double that drain interval, still giving your engine good lubrication and protection.

 

That sounds like a good idea . . . any labs that you know that you can recommend? I use Mobil 1 in all my normal daily drivers - would be nice to have some of it tested. I run high-quality K&N filters as well.

 

Hey, I use Advanced Auto Parts 20/50 store brand oil in the GizzlHopper. It's cheap, it works and the Gizzle loves it. Course I change it every fifth cackle (about 18 minutes running time.

 

Royal Purple here. Use it in everything also, lawnmowers, motorcycles, the lot. I first got on to it when I was running my turbo nitrous funnybike. It works!
We did oil spectro ****ysis of many oils. Truth is, ANY synthetic is better than ANY conventional oil, and that's the end of the story. As it happened with the lab tests we had done, RP was in fact, at the top of the heap. We ran an engine for 27,000 miles with the same oil with no degradation of it's properties. At 27K, we started to see traces of paper in it, indicating that the filter was disintegrating. So I run my street cars 15,00 miles between oil changes, which gives me a safety margin before my filter's start to **** out. Two of my street cars have over 200,000 miles on them, one has over 255,000, and they've never had a valve cover off them (they have had new timing chains and water pumps). Royal Purple.

 

I've recommended that, but the fleet isn't my responsibility otherwise I would do just that. I'm running my daily at the same interval and depending on the next ****ysis, I will probably bump it up to at least 12k.

 

Amsoil offers lab oil ****ysis service thru Oil ****yzers, Inc. A postage paid both ways kit is $31.25 retail, so it isn't something you do at every oil change just for curiosity! Just extend after each good test till you start getting marginal, then back up a bit, and settle for that. Only one I lab test is my Chevy Duramax diesel, which also has a dual remote oil filter setup that includes a full flow filter more than double OEM size and a huge byp*** filter. I take a sample once a year and they reply whether to change oil & filters, change only filters and top off oil, or to continue as is. Have run the same oil as much as 3 years! Lab tests were still good, but I changed anyway!
My OT daily driver, a Lincoln MKVIII gets a once a year change of oil and filter,also Amsoil.
There are other oil labs that I'm sure you could find with Google, Blackstone is one, IIRC.
Dave

 

I worked at Royal Purple for 9 years, 80% synthetic, 20% base oil blending.
Really great lubrication for newer engines. But slicker than greased owl ****. In other words it loves small leaks. IMO.
Synthetics arent all they are made out to be.

 

We use Rotella T and Royal Purple both had decent luck with some failed engines but don't think it was the oil more likely the machine shop or ME LOL

 

You just confirmed, what I heard a long time ago, about the synthetic finding its way out. I've never went about using it, for that very reason. Always wanted to, though!

 

Yep, I found out first hand with my 59 Apache...

 

The NAPA part number this is VAL850.

 

Two of the vehicles I have used the Amsoiol in have/had some age and miles on them.
First car I used Amsoil in was '65 Mustang with the I-6. This was in about 73/74 and the car had God only knows how many miles on it and leaked dino oil at the rate of about 1000 miles to the quart. It leaked at the front seal, the rear main seal, the oil pan, and the side cover. When I changed to Amsoil synthetic it still leaked, but no more than it leaked with dino oil.
My OT daily driver now is a '94 Lincoln MKVIII with 115,000 miles. That car is 17 years old now and don't remember ever adding a quart of Amsoil synthetic between changes which are at 25,000 miles. No leaks whatsoever on my '03 Silverado Duramax.
Dave

 

Thanks for the info, I think I will run Amsoil in my daily (100 miles round trip a day) and try it with the extended oil change intervals......

My rod I'll keep it with Val Racing....

 

Well I guess that clear up any question I might have had?????

 

I was told the same thing when I changed my electraglide to amsoil.it would start to leak. after several thousand miles. no leaks. same with both of my trucks. I dont believe it finds leaks other oils wouldnt.

 

I haul everyday

I trust the rear differential in my F350 to Royal Purple 85/140

Nothing better in my humble - yet educated - opinion


Jim

 

X2....Agree !! As I stated in an earlier post, I too have the same experience and have been running RP for over 10 yrs and run it in everything I own. Thanks for the details you mentioned.

 

Brad Penn here.