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I've been using Pennzoil SAE-40 in my Intruder Motorcycle for 40K miles. No problems. However, it's getting REALLY hard to find. But, the local Kragen does carry conventional Valvoline SAE-40. I do know that several of Valvoline automotive oils, including their synthetic, racing and conventional...

For a year or so, I've been seeing a lot of commercials for engine oil yakking about "sludge." They appear to be associating it to high engine temperatures. Help me out here. I thought sludge was a product of cold running temperatures and lots of contaminants. Cars usta have 165F thermostats...

I've been running Pennzoil 10W-30 from Nov thru May, then Pennzoil SAE-30 from May thru Oct in my 120K mile 1998 Grand Prix. Engine's been nice and quiet the whole time. Due to excessive driving early this CY, I ended up changing the oil two months early (early Mar), and I used Chevron 10W-40...

I'm fascinated that long haul trucks use multi-grade oils. Regardless of brand or type, multi-grade oils will lose viscosity over time due to polymer shear. I can see where cars with frequent cold starts and short trips and frequent oil changes benefit from multi-grade oils, but a long-haul...

I've just signed up on this board, looks like there's a LOT of REALLY INTERESTING information contained herein. I haven't done a total search, so I hope what I "offer" here isn't old hat and rehash. My "opinion" of full flow oil filters (not based on scientific experimentation). 1. I think...