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- 2018 CX-5 Sport
As long as the oil weight is right, it seems to be the owner's personal choice to use synthetic or the less expensive conventional oil. Is anyone using conventional oil?
Technically our owner*s manual says only to use SAE 0W-20 oil *certified for gasoline engine* by API for non-turbo 2.5L. But it would be very difficult to find a conventional 0W-20 oil and most of them are full synthetic.
But for new 2.5T there*re plenty of conventional or blend 5W-30 oil around. Due to very high heat from turbo charger, full systhrtic oil should be used. VW didn*t enforce full synthetic oil in early 2,000*s for its 1.8T and result was not pretty. The conventional oil got cooked in turbo charger caused oil sludge issue, and class-action lawsuit followed.
Besides, last time I checked, conventional oil is not much cheaper than synthetic oil like the old days. And I have been using full synthetic oil on all of my newer vehicles for the last 20 years. Only my 183K-mile 1998 Honda CR-V uses 5W-30 Castrol GTX conventional oil since it*s new.
Can get a 5 qt. jug of synthetic oil from Walmart for around $20-$25. Why even consider an oil that you should not be using in a Mazda Skyactiv engine?
Agree with my esteemed colleagues. What are you going to save? $10? Use the good stuff.
I have never let my Direct injection motors go 7500 miles between changes...the fuel dilution isn't worth the risk...of course my 5000 miles is all hills and mountains and traffic...and I was still adding Liquid moly at every change too.
I have never let my Direct injection motors go 7500 miles between changes...the fuel dilution isn't worth the risk...of course my 5000 miles is all hills and mountains and traffic...and I was still adding Liquid moly at every change too.
No risk might apply to Mazda, but if you have a Honda with the 1.5L turbo, you'd better change the oil every 500 miles....lolWhat risk? Lol
The numerous oil analysis posted here and the overwhelming results from Blackstone kind of are enough to debunk the fuel dilution risk for *most*.
Agree with my esteemed colleagues. What are you going to save? $10? Use the good stuff.
Totally.
I've been using synthetics for close to 15 years now, and firmly believe it's made a difference in the vehicles I've owned, past and present.