For low mileage garage queens, once a year is fine. I have even read that some have gone as long as 2 years with no ill effect (backed up by oil analysis) but why bother? With the cost of oil, it's cheaper to just change the oil than to do an oil analysis.
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Daijiro Katoh - Champion Forever!
Past: 92 EG w/JDM B18C, 00 EK w/JDM B18C, 04 600RR, 97 ITR #421, 10 Acura CSX-S, 17 BRZ
Current: 22 BRZ, 00 S2K - #0220
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