... 'cept for with a synthetic oil you want the first number as low as possible - its really only the second one that matters and even at that the flow characteristics when the vechicle is up to temp are very close to each other (flow is one of the most important aspects of your oil for lubrication). Synthetic also holds up better to heat and thermal cycling, esp with car's like ours that run hot.
I wonder about the filters on our cars. I could put four or five of the 370Z filters in my 240Z filter.... I think that was a big aid in helping engines last....
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'09 370Z - '93 300ZX Vert - '83 280ZX - '83 280ZXT -'81 280ZXT stroker - '72 240Z - Stillen CBE, HFC, G3, Grounding Kit, Sways // Swift Spring // H&R 15mm // 5% Tint // Clear Bra // 
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