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Big Z wrote:Seeing that friction modifiers break down and not the actual oil, do you really think this makes sense?
Again, with our temperature range... 0W is totally unnecessary.
In another post in an oil thread, I showed that the difference between Royal Purple 5W40 and 15W40 was negligible at 40*C. Do you think 0W will be any different?
Again, why use an oil that will break down easier, and was most likely not recommended from your vehicle manufacturer?
Dave wrote:I am interested to know all you guys who use a "fully synthetic" oil, what duration of km's you run before changing? If extended, at what point if u do, change the filter?
CD4Accord wrote:Honestly, if the Royal Purple gave the engine any more power you wouldnt be able to perceive it without doing a massive amount of dynoing before and after..
The minute difference that an oil can make to power will never be felt unless you were running a high performance vehicle and blatantly using the wrong grade (eg. 20w-50 in a Ferrari F430 Scuderia)
Concerning quietness, certain oils have been known to reduce lifter tick in certain engines so that is possible...
What grade RP were you running?
You are changing dino at 3750 miles and synthetic at 3000 miles?
Typo you made?
EVA Unit-01 wrote:chris1388 wrote:Eneos 5W-40
Fine Tuned Performance Santa Rosa (Garth) - $70 a quart
ey ey! a ENEOS man!!! tell we how it werks...
also, Big Z, u doh hav Royal Purple in 5w40???
EVA Unit-01 wrote:UPDATE: so i just came back from the dealer, where i changed my oil from the Shell Helix Ultra 5W40 full synth (which i've been using since i bought the car - 25 months) to Royal Purple 15W40 full synth
N.B. for this comparison, ONLY the brand/body of the oil was changed while everything else remained constant (gas type, oil filter type, etc) to compare the effects of the oil on driving
there was an immediate reduction in engine noise, which i was told about (by a friend) but didn't really believe until i witnessed it myself. the engine is almost silent at a parked idle, and is now like (educated guess) 40% quieter while running (hard).
traffic and low brake pads kept me from pushing a bit, but what little i managed showed no perceivable difference from 5W. will observe over time as the engine gets conditioned to the RP...
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