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Hi, I used to race with a car/engine combo and used redline straight 50wt oil. I ran out of money (and perhaps never had the talent!?), and now track a miata. I have been using M1 0w-40 with good results (apart from some fuel dilution). I have an almost full box (12 quarts?) of the redline...

As per the subject, can oil flow backwards through an oil filter? Meaning if it was hooked up backwards so that in was out and out was in, how much oil would flow? Depends on the filter? How about this one? Ryco Z9 Filter

Hi, Just chatting with the guy at work who makes the agreements for our (smallish) fleet servicing. We are the process of tendering for our fleet servicing. We follow the vehicle manufacturers log book recommendations. Some use mineral oil, some synthetic. Anyway, question from my colleague is...

Hi, Link to UOA for M1 0w-40... M1 0W-40 UOA This after 3 track days (say 400km total) and around 1000km of road driving. Vehicle is 2001 Mazda Mx5 / Miata. OEM mazda oil filter. Total km on vehicle is approx. 70,000km. At the track it's between 5000rpm and 7200rpm. The road km are just...

Hi, I have a 2001 Mazda MX5 (1.8 VVT engine) which does about 50% hard track driving, and 50% road driving (a decent amount of the road driving is getting to the track!). I have been using M1 0W-40, and have been very happy with it, apart from the price. It is a little 'tappy' but no real ill...

Any suggestions on minimimum content of ZDDP should be for a fairly aggressive solid flat tappet cam and ‘heavy’ valve springs? What’s the maximum level before problems (if any)? The net, where data is available, seems to show oils with ZDDP between 1000 ppm and 2000 ppm. It’s interesting to...