Drive a 93 Probe GT in addition to my 97 Mystique 2.5 , here is a quote from the 'guru' over at the Probe forum .....
"Note on Castrol Syntec/Magnatec
o This oil is not good for engines.
o Recently reformulated and isn't a real
synth, despite what Castrol may say.
o The GTX product and RS products are fine
(but ensure RS is in 0w30/0w40 not 10w60).
Syntec/Magnatec:
o Forms ash deposits on valves
o Additive pkge sludges in engine & bottle!
o Draining sees black-flakes which are a wax
and additive coming out of suspension.
This has been seen in Mazda, Audi, BMW.
Both turbo & non-turbo cars, UK & US cars.
UK people after a cheap synth find a Motor
Factor/Charlie-Brown for Comma 5w40 Synth.
From the Motor-Factor it's £17/5litres, but
make sure the Tech knows it's 5 not 4!
Mobil1/Amsoil/Redline real-synths are fine.
Amsoil use the same base-stock as Mobil.
Finally, remember don't use Fram Oil Filters.
Their anti-drainback valve DOESN'T work in
our engines - on V6 or I4, I tested them and
Bosch/Mazda(Tennex) do work but Fram DON'T.
HLAs will be noisier with Fram/Fram-rebadged."
carbon
