Anybody used Redline oils? I think it's an American outfit?
(I had their 'Shockproof' gearbox oil put in my Subaru in Australia and it made a massive difference, just no experience of the engine oils)
i just found a website selling royal purple engine oil for about £12 for a quart which apparantly isnt far from a litre, thats not a bad price, cheaper than castrol edge!!
i know what oil i'll be using when my next service is due!!
Amazing the difference between the royal purple and mobil 1
i use millers in mine seems fine but hey what do i no, but i am intrested by purple.
Hey i wanted to know would this oil be good for my BMW E46 325TI 02? if not which is the best oil to use but this purple royal sounds good!
Interesting thread, but reading the article it is testing film strength only, for a new oil at room temperature. to me, this isn't enough justification for jumping to Royal Purple. Does anyone have any information on how the different oils deteriorate over time and temperature, or how good their detergents are? (No good having a good film strength if the oil can't get where it's needed due to sludge build up...)
Hi, i'm new to the forum. i drive an M3 evo and happened to be researching about oils and thought I'd sign up to this forum as I came across this thread whilst doing a google on different oils.
I have read the pdf that is listed in the first post, i actually came across that a while back and it was that pdf that swayed me to put RP in my engine, gearbox and diff! Anyway, that test i think is a bit misleading. Its done on a machine that is used to test oil for some other type of equipment, i can't remember exactly what it was now (garden equipment, industrial printing machines maybe, i can't remember exactly but talking to a gentleman at opie oils shed a lot more light on that machine and what it is).
Point being it isn't made to mimick the internals of an engine, that's for sure. Also, why use different grades of oil? if you're testing like for like then pick all the oils that are 10w40 from the respective manufacturers, it's only fair. I would have thought that a 10w40 oil is going to have better film strength than a 0w30 or 0w40, no? (I'm no expert so I may be wrong in my assumption).
I don't want it to sound like i'm saying that RP is a bad oil, it's just doing what most other companies do and pumping itself up, maybe a little too much. I am having problems finding the HTHS figures for the different grades of oil that RP makes, do they even publish this? Because most of the other major manufacturers do. Anyway, I did an oil change recently and put in RP 5W40, I had M1 0w40 in before. What i have found is that the car definately felt perkier with the mobil 1 in and definately gave me better MPG than the Rp does. To be fair the only positive thing i feel with RP is that for some reason the engine feels happier when constantly driven hard and revved a lot but it also gets a littel hotter than the M1 did, not that the M1 felt bad but i do notice that it feels like the engine isn't straining much but this may well be down to the car needing an oil change and fresh oil and not the fact that it is RP, or it could be the RP so I'm not slaggin RP off or anything just voicing my opinion and findings. Now, the gearbox feels a little notchier than before, i don't know if that is down to the weather getting colder or if RP synchromax gearbox oil is not as good as BMW factory stuff (whatever that is). All in all, i don't think it was money well spent and wouldn't recommend it to a friend. I was expecting more to be honest. I guess it was my fault for being so gullible, i mean if its that good why don't ferrari, AMG etc... use it.
I sincerely hope this thread hasn't upset anyone. I am just trying to find an oil that will be best for my car and the state of tune etc the engine is in at the moment (90k miles). I have seen from my service history that the dealer has put in a 0w30 oil at around 55k miles, it was porbably castrol edge as that's what bmw use so was wonderign whether to use this again, i just don't want it to make the engine noisey or be too thin for the engine. I may give motul 300v a try as well as that is supposed to be very good, as is silkolene pro s and redline. decisions decisions....
Has anyone heard of a xw30 oil as being a heavy 30 or a light 30?? I have heard people refer to castrol edge 0w30 as a heavy 30!!
i would really like to hear other poeples opinions on RP if they have used it, especially if they used 5w40 as i am seriously thinking of taking all the fuilds out and replacing them with well known brands just to be on the safe side.
Last edited by powerofm; 17-12-2009 at 11:21. Reason: spelling
Put a few drops of friction modifier in each of these oils and the test will look very different!
I have watched a guy on race retro show with a similar type of machine selling friction modifier. You could lean with your whole body weight on the lever after he added that stuff to ANY oil. Even with the roller wiped clean you could hardly stop the spinning metal bar and there was hardly any scratch on it.
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