Whats the best oil for the 8??
06-10-2008, 11:19 AM
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Quick, delete this post and use the search funcion. Or people with funny accents will come to your door and "explain" the error of your non-searching noob ***. 
Serriously,....a lot of input on this subject which will leave you more confused than ever. FWIW I am about to use 5w-30 Royal Purple synthetic. The weight being more important to me. As other markets where the RX8 is sold are instructed to use 5w-30 and not our North American recommendation of 5w-20. As far as synthetic versus conventional either will work according to most people. Just change it more often than what the manual calls for. 3K or so, since our engines use some oil for apex seal lube and fuel dilution problems.
Oh, and with a standard oil change 2 or 3 (forget what amount) quarts of oil are stuck in the oil coolers and thus we have an incomplete oil change
Serriously,....a lot of input on this subject which will leave you more confused than ever. FWIW I am about to use 5w-30 Royal Purple synthetic. The weight being more important to me. As other markets where the RX8 is sold are instructed to use 5w-30 and not our North American recommendation of 5w-20. As far as synthetic versus conventional either will work according to most people. Just change it more often than what the manual calls for. 3K or so, since our engines use some oil for apex seal lube and fuel dilution problems.
Oh, and with a standard oil change 2 or 3 (forget what amount) quarts of oil are stuck in the oil coolers and thus we have an incomplete oil change
Last edited by Bester; 06-10-2008 at 11:22 AM.
06-10-2008, 01:19 PM
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06-10-2008, 01:51 PM
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06-10-2008, 01:51 PM
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I've had some excellent results using Astroglide, but the smell sticks to your engine bay like you wouldn't believe.
5w-30 of your choice is the popular logic. no fram filters.
5w-30 of your choice is the popular logic. no fram filters.
06-10-2008, 02:04 PM
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Vtak just kicked in yo!!
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lol, hence why I said read the owners manual. 5w20 non synthetic. Every dealer Ive been too said my warranty would instantly be voided if I used synthetic. Why reinvent the wheel, just follow the damn owners manual. Or use 5w30 like they do in europe, but I wont even go that far. I use 5w20 non synthetic and Im running healthy at 67K, if others cars like synthetic, then good for them. Im not criticizing just saying what I do and how it has worked THUS FAR.
06-10-2008, 02:06 PM
#15
lol, hence why I said read the owners manual. 5w20 non synthetic. Every dealer Ive been too said my warranty would instantly be voided if I used synthetic. Why reinvent the wheel, just follow the damn owners manual. Or use 5w30 like they do in europe, but I wont even go that far. I use 5w20 non synthetic and Im running healthy at 67K, if others cars like synthetic, then good for them. Im not criticizing just saying what I do and how it has worked THUS FAR.
later if anybody bitch about the oil weight I use. I will just shovel that receipt up their ***.
06-10-2008, 02:29 PM
#19
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My dealer uses Castrol GTX 5w20 and an OEM filter. Same as I'd use if I was changing it myself.
Mazda dealer, so who would know better?
FWIW, Valvoline told me that all 5w20 oils contain synthetic stock, so if you're worried about 20 being thin but believe that synthetic provides superior protection it all works out.
Ken
Mazda dealer, so who would know better?
FWIW, Valvoline told me that all 5w20 oils contain synthetic stock, so if you're worried about 20 being thin but believe that synthetic provides superior protection it all works out.
Ken
06-10-2008, 02:38 PM
#20
My dealer uses Castrol GTX 5w20 and an OEM filter. Same as I'd use if I was changing it myself.
Mazda dealer, so who would know better?
FWIW, Valvoline told me that all 5w20 oils contain synthetic stock, so if you're worried about 20 being thin but believe that synthetic provides superior protection it all works out.
Ken
Mazda dealer, so who would know better?
FWIW, Valvoline told me that all 5w20 oils contain synthetic stock, so if you're worried about 20 being thin but believe that synthetic provides superior protection it all works out.
Ken
dino juice is just not as good as the *man-made* stuff (synthetic), so mixing it with synthetic basically just "watered down" the effect of pure synthetic. the only good thing about it is that, well, its much cheaper.
but no matter what, 5w20 is just too thin, at least for certain parts of the engine.
30 is something that people should use ...
Mazda dealer knows best ... yep ... thats probably why they overfilled my car just 3-4 days ago ...
06-10-2008, 02:43 PM
#21
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I have never had anyone but me fill oil exactly to the line. Everyone else that I've ever paid for an oil change has gone over.
Ken
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