I'd like a some input from a few of y'all who are in the know regarding the desirability of using Royal Purple synthetic in my vehicle. I'm currently driving a 2000 F250 psd 4X4 with 57000 miles on the OD, and I use---right now---Shell Rotella oil for the changes. Is the extra cost of the synthetic worth it?....(I can order a 5-gallon pail for $90.00 online, or 4 gallons for $77.00). Four gallons of the Shell is about $32 and change. I hadn't really thought about it too much in the past, but spoke with my brother recently (works for The Contractor Yard) and said they'd just got in a couple of 55-gallon drums of the stuff for their delivery trucks and their boom truck, and he was surprised because it was THE premium stuff out there and expensive. And yes, I've been researching the Royal Purple web site and their ancillary "longrider.com" for ordering information. So.....do any of y'all swear by it?....Haven't checked the prices of the Purple at the local (Charlotte, NC) stores that carry the stuff yet (Pep Boys, Charlotte Performance racing), so I'm not sure if I can get it cheaper buying it locally or through the web site (obviously shipping costs would come into play also)........Any input is appreciated....Thanks.

Steve

 

I'm not a beliver in synthetic unless you dramaticly extend your OCI's. Quality "dino" oil will do just fine if you follow your owners manual for intervals.

For commercial or racing applications, maybe. For a "civilian" truck, no way. Not if I'm buying.

Unless it gives you a warm and fuzzy feeling by using it. Then have at 'er.

 

Royal Purple is no better then any quality synthetic oil on the shelf. Sythetic without a doubt helps but there is something to be had with dino too. I'm a blender and proud of it. I extend my OCI's by a couple K miles but not to what you could with full synthetic.

 

I would say RP is the best synthetic out there. The problem is, your engine would last just as long using a quality Dino oil. This forum has convinced me of that fact. I also look at the guys here at work and the different ways they maintain a vehicle. A few of the guys are the "buy what is on sale" type that might remember to change their oil every 8000 miles, and use a cheap brand at each change. Our work trucks run a conventional dino and are greatly abused, yet go to 100,000 miles using no more oil than they did when new.

I quit using RP and am moving to Havoline. I admit to it being mainly a price issue, however, there is no extra benefit to RP in a standard car.

 

Best synthetic oil is Redline and other ester based synthetics.

 

TallPaul, I've been running Royal Purple for quite some time now and am very happy with it. However, I don't own stock in the company so I would be interested in seeing test data comparing RP with Redline. Do you know where I could find some?

 

I don't know other than the manufacturer's data could be compared. These oils are overkill for most applications, but Redline will take the heat better and has high levels of zddp antiwear protection. I recall the flash point on RP 10w40 was pretty poor last time I looked. The other grades seemed okay though.

 

Thanks for the input. Thanks 0Sin86 for following up with an "OCI" after seventyseven250 used "OCI".....Figured it's "Oil-Change-Interval"...correct?....Gotta get used to these abbreviations. Anyway, I'll consider it a little longer, and thanks for both the "dino" guys and the "synthi" guys for chiming in......Gives both sides. And it IS a bit more money, so that IS a factor.

 

Sorry, OCI is Oil Change Interval, you were right.

Myself, It comes down to a money issue, so I use the cheap stuff. If I had more cash, I'd use synthetic, no doubt.

 

Don't have much experience with it in diesels, but RP dramamticly improved bearing and gear train wear in Nat Gas engines offshore. OXY petroleum switched over to it years ago when they took over all of Conoco's platforms. They overhauled everything and switched to RP. They swore by it. From some of the bearings they showed me, it was much better than the same run time bearings using Dino. I currently use Rotella T syn, as RP is not readily available as Shell (every china-mart up here stocks Rotella syn)


Ryan

 

mrxlh, the company I work for (big oil) experienced the same thing on our reciprocating compressors. Rebuild intervals went up by 4 times. You can buy RP at O'Reillys and over the internet. There is a company that will ship it to your house. I'll try to find their website.

www.rpmoil.com

 

It seems that the syns are great at temp extremes, and for equipment which is used hard, and coupled with long drain intervals therefore putting less used oil into the environment, some folks might try a syn. But it is difficult to claim that an engine will last X% longer with syn than would the same engine run on dino with shorter drain intervals; too many variables come into play, and the oil mfg. hesitate to make such claims.

 

Sythetic helps without a doubt but when I was running large drilling equipment we couldn't tell any difference between RP and Amsoil.

 

okst1.....my brother showed me longrider.com.........good site........5-gallon bucket for $90 or 4-gallons (I need at least 3 1/2) for $77.00........little less than $20/gallon (don't know what shipping is yet...), and pay $8.00/gallon for the shell rotella, so about 2 1/2 times the cost of the dino.......they'll only ship by the gallon with a 4-gallon minimum......obviously they cater mostly to big rigs and fleets.......have listings for ordering tranny fluids and grease too.........good website...

 

p.s. Pep Boys was a bust....only had quarts and only in 10w30 and 10w40 and about $6.50/quart, so about $25.00/gallon....NOT!!!