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2009 Jetta SE Quaker State UD 10w-30 K&N PS-7010 12,000 miles (longest I've ever waited)

2011 Mazda 6 Out: Mobil 1 10W-30 and Purolator PureOne In: QSUD 10W-30 and Purolator PureOne

Mobil 1 was not on sale this week so I bought QSUD for the first time. This is for my Mazda 6. Supposed to be 10 below tomorrow so I'll see how the engine starts up.