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need RX7 · 03-23-2011, 03:05 PM

My FC has 203xxx miles on it and has a tendency to spit out large clouds of smoke under certain conditions (usually during high RPM upshifts, or revving at high RPMs in the driveway like a ricer). A guy on another general car forum I'm on mentioned switching to Valvoline Maxlife Synthetic blend in his (non-rotary) vehicle, and claims he burns far less oil then he did with normal 10w-30 oil. Do these 'high mileage' oils live up to the hype and are they worth the additional cost? I'll be changing my oil soon and I'm thinking about trying something other than my usual Castrol GTX.

03-23-2011, 03:05 PM	#1
need RX7 Clean S4 Nutswinger Join Date: Mar 2008 Location: Sterling Heights, MI Posts: 485 Rep Power: 18	'High mileage' oil? My FC has 203xxx miles on it and has a tendency to spit out large clouds of smoke under certain conditions (usually during high RPM upshifts, or revving at high RPMs in the driveway like a ricer). A guy on another general car forum I'm on mentioned switching to Valvoline Maxlife Synthetic blend in his (non-rotary) vehicle, and claims he burns far less oil then he did with normal 10w-30 oil. Do these 'high mileage' oils live up to the hype and are they worth the additional cost? I'll be changing my oil soon and I'm thinking about trying something other than my usual Castrol GTX. __________________ -Ted -1986 Mazda RX7 Sport [DD/beater]: engine finally let go at 205k. parts car status. -1986 Mazda RX7 base [resto-mod project]: S5 n/a swap in progress.