I just purchased a Mazda 3, it's a 2004 with 89k km on the clock. I
believe all previous oil changes were done with conventional, but I
know the characteristic differences between conventional and
synthetic, which makes me believe that in the long run synthetic is
the right choice. Quaker state makes decent synthetics, So I believe
(been using the advanced stuff for the past 3 oil changes in the
1.8t). Would the new Quaker State "horse power" 5w20 synthetic be
ideal for the Mazda 3? I'm not a ricer or anything putting octane
boosters in my 3 to gain performance, so I expect no performance
actually from this oil, just a good synthetic that wont sludge up as
much as conventional.