2010 Mazda Mazdaspeed3 Sport 4dr Hatchback (2.3L 4cyl Turbo 6M)
I noticed a black soot material on my tailpipes (which I've since learned is normal for turbocharged cars) but I heard that previous models had issues w/turbo smoking (smoke coming from tailpipe at idle/all engine speeds) & I thought this might be the onset. Videos are online if u Google. Mazda allegedly fixed this in 2010 but there's a "mystery" Tech Service Bulletin (TSB)for service depts to switch owners to 5W-40 synthetic vs. std 5W-30 (what the filler cap & manual says). TSB doesn't apply to 2010 models. My dealer couldn't even find the TSB in their system! Question service depts b/c Mazda N. America doesn't endorse synthetic oil or 5W- 40! Could void warranty b/c manual says 5w-30 oil.
Mazda N. America needs to get w/it! Turbo engines need the added protection of a synthetic oil for longevity. Customers/service depts are confused by your guidance...clear it up! For 2011, chose an synthetic oil (i.e. Mobil 1) and pre-fill from the factory. As for me, I'm running Mobil 1 5W-30 Ext!
† Edmunds.com received the highest numerical score in the proprietary J.D. Power 2014 Third-Party Automotive Website Evaluation Study℠. Results based on responses from 3,381 responses, measuring 14 companies and measures third-party automotive website usefulness among new and used vehicle shoppers. Proprietary study results are based on experiences and perceptions of owners surveyed from January 2014. Your experiences may vary. Visit jdpower.com.