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964 Oil Temperature


Vehicle Information: Year: 1989; Body Type: Coupe; Engine (type, size, modifications): 3.6 liter, cat. removed, muff bypass pipe, cup air box, chip; Total Mileage: 72,500;

My 1989 911 C4 (964) is primarily a weekend driver but it also participates in Driver Education events about four times a year. The spirited driving of these events elevates my oil temperature above what I see even during heavy traffic on a hot summer day. My cars engine undertray is long gone and I remove the passenger side fog light at track events, but still the needle can rise to about horizontal.Although I am armed with Bruce Andersons temperature assessment of 230 F is warm, 240 F is hot, and 250 F is too damn hot, the fact that Porsche no longer puts numbers on their oil temperature gauges leaves me with some questions. First - Am I correct in assuming that Bruces rule of thumb applies to the 3.6 Liter 964 (and for that matter the 993) engines? Second - What temperatures do the tick marks on my 964 oil temperature gauge actually represent? And third - I know that Im not the first person to put a 964 on the track, especially the RS Americas. Did the RS America have a larger oil cooler, are there after market coolers that I would benefit from, or are there any tricks that others have found to keep their 964s oil temperature in check?

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