Royal Purple Synthetic or Castrol Edge Synthetic?

[19dabeast85]

My experience:

The F22 runs noticeably smoother with Royal Purple over Castrol fully synthetic. Running RP returns oil analysis' with fewer wear metals than any others I've tried (including Torco, never tried Amsoil).

Royal Purple oil filters are garbage, the oil drainback valve is an inferior design and you will have 2-3 seconds of no oil pressure on every startup after the engine sits for 3+ hours. I normally run Purolator PureOne filters with RP oil and I go 10k with my crv, 3k with the CB because I drive it hard.

However, as stated before, if you just dd your car and rarely push it, regular dino oil is fine and any synthetic other than Mobil1 is excellent protection!

[98vtec]

I've ran royal purple ever since running amsoil and killed my rocker arms. Since the RP move, never had a problem with wear or anything on my magnetic drain plug.

RP is the shit. if i moved to any other oil it would be brad penn.

[91VtecWagon]

Walmart sells MOBIL 1 synthetic oils for 6.50$ per quart/26.50$ per gallon....CHEAP

[Cb_JoeyG]

All to expensive, but i noticed more noise up top after using both mobil1 and RP. So i run castrol 10w30 full syn. and seems to be doing fine But like stated, if you are running these expensive full syn oils you can change the oil every 5k without worrys unless you use a shitty filter.

[Timothy Watson]

wow, I've been running Castrol full syn. with a fram filter in every car I've owned and always stressed about going to far over 3k... I might try to let this next change slide a little farther.

[deevergote]

Full synth should be just fine. I take my Fit to 10k regularly (though that's 2 months, tops...)
Fram filters kinda suck, though. There are better filters on the market. For readily-available filters, I'd pick up a Purolator Pure One. They're probably the best you can get from most stores. There are most likely better... but for our old cars, it's highly unlikely we'll ever need better than that!


Also, as I'm sure I or someone else has said in this thread already... unless you're running major mods, or you have an abnormally long oil change interval, you really don't NEED anything more than a quality regular oil. Anything "better" than what the car needs is kinda like shouting at a deaf guy.

[Cb_JoeyG]

Well mineral oil aka conventional isnt necessarily the best.. at least use synthetic blend.. And yes purealator is good shit as well as WIX

[Timothy Watson]

Then I shall ride out this change another thousand or two. Now not trying to be too far off topic but is there the same unspoken rule or generally accepted idea for tranny oil as well or is that 30k and Honda atf ONLY...

[ferenza]

I decided to put rp in ly car because i drive hard sometimes and usually regular oil turns black before 2000 miles.

the previous owner didnt maintain the motor so when i pulled the pan i seen alot of sludge.i did rthe old atf fluid with oil in the motor to break it up and i changed my seals because i knew the may leak afterwards.mobil 1 makes my engine tick louder than the royal purpal does and the engine runs a little rougher.with royal purple i barely hear or feel the engine at idle.

[deevergote]

Then I shall ride out this change another thousand or two. Now not trying to be too far off topic but is there the same unspoken rule or generally accepted idea for tranny oil as well or is that 30k and Honda atf ONLY...

If you start another reply with "not trying to go off topic", you will find your post count reset to 0 due to post-whoring.

[91VtecWagon]

i have noticed with the cheaper Mobile 1 at walmart that my engine ticked more up top than before. instinctively i now use Castrol fully synthetic with a K&N filter and it does a whole lot better. atleast to satisfy the ticking in the head. maybe it even helps keep oil pressure at optimum performance for Vtec

[MortsAccord]

Fram filters are shit.

Best filter for the price is a Purolator PureOne.

Give me the best filtration with the cheapest oil walmart sells instead of the best oil and a fram filter.

[19dabeast85]

I decided to put rp in ly car because i drive hard sometimes and usually regular oil turns black before 2000 miles.

the previous owner didnt maintain the motor so when i pulled the pan i seen alot of sludge.i did rthe old atf fluid with oil in the motor to break it up and i changed my seals because i knew the may leak afterwards.mobil 1 makes my engine tick louder than the royal purpal does and the engine runs a little rougher.with royal purple i barely hear or feel the engine at idle.

Trying to understand your wording....are you saying that with RP your engine was quieter but ran rougher?

On both my cb7 and crv I notice a quieter & smoother engine with RP over Castrol full syntec.


As far as filters, the top of the line Fram is a pretty decent filter, all other Fram filters are junk. I personally run Purolator PureOne (arguably the best filter for the price for 99% of applications). If I plan on extended drain intervals I'll run a K&N or Bosch filter. These filters can hold a larger number of particles before becoming clogged and impacting oil pressure.

[Leung]

i have noticed with the cheaper Mobile 1 at walmart that my engine ticked more up top than before. instinctively i now use Castrol fully synthetic with a K&N filter and it does a whole lot better. atleast to satisfy the ticking in the head. maybe it even helps keep oil pressure at optimum performance for Vtec

Whew i thought i was the only one that heard that valve chatter more after using Mobile 1 synthetic. Every time i said that, someone would always come back and say it was all in my head.

[19dabeast85]

Whew i thought i was the only one that heard that valve chatter more after using Mobile 1 synthetic. Every time i said that, someone would always come back and say it was all in my head.

It's not in your head. Mobile 1 has a great reputation because most people PERCEIVE their visually appealing products, cool commercials, and the fact that they pay big bucks for high-end cars to tell people to run their oil (Corvette, Viper, etc) as meaning they are a quality oil. Run an oil analysis on Mobil 1 synthetic vs almost any other oil, dyno or synthetic, and you'll find inferior protection from the Mobil 1. Mobil 1 is a great cleaner, they have tons of detergents, but they are a poor lubricant. Evidence collected using my own oil samples and Blackstone labs oil analysis.