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Originally Posted by Mainlube
Mainlube has just released a new Mainlube 175 Synthetic Race SAE 0w40 designed for the Ford Focus, diesel and petrol.
Spec's cover the exhaust soot filter for the diesel.
Retail is $29.50 +gst.
Cheers
Steve
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the manual recommends 5w30 for my petrol focus
what effect would using 0w40 have on the engine?