royal purple vs motorcraft - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 14 (permalink) Old 07-21-2013, 11:09 PM Thread Starter
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royal purple vs motorcraft

Its almost time for another oil change. So far I've used only rotella-T and motorcraft. Just on a whim I read up on royal purple. It says comparable with gas AND diesel engines. As with most theories, a product that does the job of 2 separate products usually isn't as good as the purpose built product. Is this the same here? Is the extra $5/gal for the dual purpose use? Or is it worth it to my diesel to pump out an extra $20 this oil change?

I work with people entrusted to maintain and repair $110 million airplanes, but can't change a car battery.

2001 F250, Floyd's Stage 3 trans, GTP38R, aFe Stage 2 intake, TS Performance 6 position, 5" Diamond Eye straight turbo-back, 6" Pro Comp lift, 36" Nitto Terra Grapplers
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post #2 of 14 (permalink) Old 07-26-2013, 12:11 AM
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Re: royal purple vs motorcraft

I ran royal purple for a while till I learned better than to waste my money. These engines shear oil. No matter what magic potion you use there is no way around it.

I run Rotella t6 in mine. Buy it by the barrel if you want to save more money and put on a lot of miles.

Oil analysis puts your mind at ease...

2K Excursion, AFEII intake, 4" straight exhaust, DP F6, 200cc singles, 38R, RR, T500, ATS stage II with 5 star tc
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post #3 of 14 (permalink) Old 07-26-2013, 12:27 AM
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Re: royal purple vs motorcraft

I wouldnt waste the money fr the royal purple that's gonna be sheared all to hell in 5k miles anyways iwould just run regular 15w40, I prefer valvline or delo myself, my truck runs terrible on motorcraft or rotella

02 250 CCLB, 6 spd, PHP Phoenix, ISSPROs, AFE/6637 intake, 4" DE straight exhaust, WW, coolant filter with ELC, AIH delete, ebpv delete, bellowed uppies, 4" on 35's and racelines
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post #4 of 14 (permalink) Old 07-27-2013, 08:41 AM Thread Starter
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Re: royal purple vs motorcraft

exactly what I needed to know. Mine runs perfect on Motorcraft and Rotella, it's all I've ever put in it. I've been told Delo and Castrol are the worst things you can do to any engine but I suppose everyone's setup is kind of case-by-case basis and some experimenting is required to find the best brand/blend. Thanks for the advice.

I work with people entrusted to maintain and repair $110 million airplanes, but can't change a car battery.

2001 F250, Floyd's Stage 3 trans, GTP38R, aFe Stage 2 intake, TS Performance 6 position, 5" Diamond Eye straight turbo-back, 6" Pro Comp lift, 36" Nitto Terra Grapplers
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post #5 of 14 (permalink) Old 07-27-2013, 10:35 AM
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Re: royal purple vs motorcraft

i run rotella or kendall.. good quality oil at a good price

2002 7.3 stabbin waggon ... 4in turbo back, cold air, autometer pillar, dp-tuned...more to come, feel free to make donations
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post #6 of 14 (permalink) Old 08-07-2013, 08:21 PM
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Re: royal purple vs motorcraft

Been running Rotella T-6 synth in my 6.0 & 7.3, never had a prob with either. They run great.
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post #7 of 14 (permalink) Old 08-07-2013, 09:51 PM
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Re: royal purple vs motorcraft

Ive always ran Valvoline Premium Blue in all mine, until recently switching to Rotella T6 and never had a problem with either, Valvoline made my E99 run the best out of all the dino oils I've used. Really like this T6 though, faster and smoother starts and just feels like the truck runs smoother than on the regular oils.

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post #8 of 14 (permalink) Old 08-07-2013, 10:24 PM
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Re: royal purple vs motorcraft

Heck, my last oil change I used Mobil 1 TDT.

Are synthetics just not that great for these engines? Or do people just consider it tossing money away?
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post #9 of 14 (permalink) Old 08-07-2013, 11:05 PM
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Re: royal purple vs motorcraft

Quote:
Originally Posted by VW_Factor View Post
Heck, my last oil change I used Mobil 1 TDT.

Are synthetics just not that great for these engines? Or do people just consider it tossing money away?
everyone has their own opinions on that matter.. although the engine isnt required to have it.. save your money.. my uncles truck is fixing to turn over 500k miles on rotella oil, never an issue

2002 7.3 stabbin waggon ... 4in turbo back, cold air, autometer pillar, dp-tuned...more to come, feel free to make donations
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post #10 of 14 (permalink) Old 08-08-2013, 03:09 PM
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Re: royal purple vs motorcraft

Most opinions and the UOA's that I've seen support the conclusion that synthetics resist shear alot better and in cold climates start up is a whole lot better, but from what I can tell both syn and dino are sheared down after about 5k miles just keep the oil changed and you'll be good, I've seen the 7.3 go 400k and climbing on rotella, I've seen one last till 680k on oil from the john Deere dealer, all at 5l mile oci. The cost of syn has always pushed me away, although I might try the new delo syn that walmart has for $ 18 a gal.

02 250 CCLB, 6 spd, PHP Phoenix, ISSPROs, AFE/6637 intake, 4" DE straight exhaust, WW, coolant filter with ELC, AIH delete, ebpv delete, bellowed uppies, 4" on 35's and racelines
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