Quote:
Originally Posted by FlaK
10w40 is only "thick" when cold, once its good and warm its fine, and when its nice and hot after being run hard the thermal shear probably drops it closer to 10w30, running 10w40 means the oil has less thermal break down, thus better lubricating/coating at high temps, such as our wankles see, the oem spec 5w20 is simply a mpg move mazda did. that cost the lives of most of these motors early, just trying to get better mileage. Alot of debate towars oil with renesis, ive done alot of reading and i just went with what worked on my past rx7s, from my 12a's, 13b's to this, castrols never let me down.
Mine usually sits in the garage but i run 10w30 and 10w40 depends on the time of year and what im doing. Sohn adaptor is great mod, i just installed it, once this oil is ready for a change, ill be going to synthetic 10w30, cuz as you know shes not sipping on her own life blood lol. then I can do away with oil changes every 4k, bonus.
I got the same BHR mid, and the racing beat catback, great sound.
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But isn't cold wear where a lot of wear comes from? At least that's the case for piston engines. That's why a lot of newer cars are pushing 0W-20 nowadays since it means you get the quickest oil flow on startup after all the oil drains back to the oil pan from sitting overnight.
Oil is a pretty big debate. The previous owners of my car have used 5W-20 conventional only, and I have done the same. I am aware of the fact that thinner oil can break down from heat, but my UOA analysis showed that there is little wear metal in the oil, so it's doing its job. If I live somewhere hotter, I would have gone up to 5W-30 or even 40.
I just make sure I check the oil level at every gas fill up. Series 2 actually makes the process easier. The dipstick is easier to access and the engine cover has a little port that opens so you can access the dipstick without having to remove the whole cover.
The downside for me is that I have to change spark plugs yearly now. I was actually shocked at how gross they look after only a year of driving, and I drive pretty hard.
Quote:
Originally Posted by FlaK
if you look up oem specs for oil in europe for rx8's they call for 10w30 syn.... and we wonder why so many dealers were doing re and re's ahah
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I think Mazda recommends 5W-30 conventional on the other side of the pond.
They never officially recommended any synthetic. The official stance seems to be that you can use it, but they don't recommend it. I just stick with conventional because it's cheap and at 5000 km change intervals, I won't enjoy any benefit of the synthetic oil anyway.
I think another thing is that Series 1 also had inadequate oil injection by stock tune, which also caused the apex seals to fail faster. Have you cranked up the oil injection rate on your Series 1?