royal purple
 

Im looking into buying a used 97' baja boss 232 with a built 502. The original owner and builder of the engine has used royal purple racing oil since break in. It now has 100 hrs on the engine. Does anyone have an input on using this oil? I have always used mobil 1 in my truck, but do not have any experience with this stuff. I have heard of race cars using it but not boats, is it good stuff and is it worth the money? Will it hurt anything switching to mobil 1 or should I continue to use what the engine has always used. I have always been confused when it comes to oil brands and conv. vs. syn., EVERYONE has a different opinion. Please help! thanks, Derrick

Royal purple is a good oil !! moble one is also ,,,its 50 ,50 which one to use ,,just get the easiest one !! If you switch to Mobile one it may and I mean may use alittle oil until the mobile one builds it on deposits around rings ,ect ,,,,, it will stop !!!!!

I have run Royal Purple since 1997 I love it. Supposed to be great for bearing surfaces.

Royal purple is better than Mobil 1 in my opinion. But dont use the racing oil. It doesn't have the corrosion and water inhibiting additives the regular SAE oil does.

I would use the regular 15-40 Royal Purple. I've talked to engineers at RP and that's what they told me.

DAVE

ok, yea iah ave heard great things about it but...where do you get it where it's not 5.99 a quart and no discount for buying cases or bulk....what gives

I'd have to agree with Dave F.
I ran RP Racing 50 all year last year and although it seemed to perform great I did get some rusting on the rockers. If you can afford to change it often it would be great.
This year I have switched to Amsoil 15-40 Diesel / Marine in my blown 540. This was recommended strongly by Amsoil tech.
No results as of yet.
Later,
Dave

Nordic be sure you don't have condensation in the valve covers this is a common problem ,may need a pcv valve
50 weight oils ??you must have some wide bearing clerances ?? that determines the weight of the oil ..
I relly like the oil your running now it will do well ,but nothing will work if you have condensation ,good luck :D

Yea-Yea-Yea -Yea
Just make sure you have oil in there!

Smart comment ,do you own a bayliner ,!!!!

I would stay with the Royal purple, it had a better base stock, mobil 1 is great I use it, but I get it for free

thanks for the responces guys, looks like ill stick to the 15-40 synthetic blend. Derrick

Sorry to disagree with everyone, but oil is oil when it comes to lubrication. I also use mobile 1, but have used everything from K-mart special to WolfsHead and I would dare say that there is one person out there that can prove or disprove that they have ever had an engine failure due to the type of oil used. Yes, Mobile 1 , and Amsoil, and Royal Purple have a slicker coating and probably less friction, but can using a reprocessed oil cause an engine failure, I don't think so. But, yes I do still use the good stuff.

Steet,

I think your comment my be a bit missleading. I'll agree with you that oil (for the most part) is oil when it comes to the petroleum blends. There, to my knowledge, was only two manufactures of oil on the east cost until last year or so. One of them was Sunoco. They no longer package and sell their own, or anyone elses oil, for that matter. So, that leaves one. The difference was additives that each company asked for.

Now, if you want to talk synthetic, it's a totally different ball game. Synthetic oil is NOT all the same. Those are the true facts.

DAVE

Dave F, You are correct. What I said was misleading. I actually do not believe for one minute that all oil is created equal. I use only the best available for my engines. I use mobile 1 in my twin 4.3 SeaRay. However, I do stand behind my statement that in all my years of performance boating and high performance cars, I have never seen or heard of an engine failure due to the brand or quality of oil. Only no oil or no oil pressure. I still challenge anyone who can prove they had an engine failure due to the type or brand of oil. I had a roller lifter failure at 52 hours using Mobile 1, but was it due to the oil or just a bad lifter? I have read a lot of post on the bad lifter syndrome. My 2 cents.

I buy the cheapest oil they sell at my auto store, and all my vehicles are still running.

1998 Dodge Ram 1500 85,000 miles Tow vehicle
1969 Pontiac GTO 185,000 W.O.T all weekend
1955 chevy deluxe 135,000
1992 Jeep 100,000
2000 Sunsation 125 hours

All of them run fine and never had an oil related breakdown

Yes but if you guys ran a good syn and the oil went to 300 degrees due to some type of event it would not brake down like a cheaper oil and protect the rest of your parts where the cheap stuff you'd loose a lot more !!

Also on oil filures most of us don't keep our toys long enough to see a catastropic failure due to oil ,the man thing is the added wear protection and insurance . And that can be proved by oil testing and has been for years ,there are alot of advantages to good oil and keeping it changed in a good motor that you want to keep and not sludge up //

I have 50 hours on my engines thus far using a straight 40wt mineral based (non-synthetic) oil. I have allowed this for break in time. This spring I will be using a synthetic oil (most likey Amsoil).

Steet,

I can't think of any oil related failure due to brand name either. The closest I can come to that is I knew someone that had a failure due to the wrong weight oil.

I used to use Sears oil in my car. Sunoco made it.

DAVE