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Thanks for the input. I will consider extending my drain interval a little. Mika

I've tried a number of different gear oils in my attempt to 'cure' the rough 1=>2 cold shift. Redline MT-90/MTL blend and Royal Purple Max Gear offered very modest improvements, but not to the level I'd like. Shifting is still rough, especially when the car is cold. Has anyone tried the SF oil...

What do you make of this? The 350Z is my daily driver and I want it to last a good long time. My goal is to find the right oil/filter combo to maximize longevity. Can I do better? The oil filter for this sample was a Purolator Power Flow (cheap paper). Typically, I use M1 or Pure1 filters. I've...

The Amsoil SDF 20 is an intriguing alternative. The one thing that concerns me is that the bypass valve is set 5 or so PSI higher than the recommended filter (SDF 13). Is this likely to be a problem if I change my oil regularly? How important are the bypass valve settings? Mika

Does anyone know how much filter media is in a Pure One PL14610? I've read that the M1-110 is about 100 sq inches... Mika

I understood that the Pure One was even more restrictive than Mobil 1... is that true? Mika

I've been using Mobil 1 filters and Mobil 1 5w-30 oil in my 350Z for quite some time (about 40K miles.) Every morning at startup, I noticed a brief grating sound that lasted about 1 second, but I figured that was just the nature of the beast, so to speak. Just recently, I took my car in for an...