Quote:
Originally Posted by underscore
jebus, I've just been changing my oil when it looks dirty (I leak/burn a bit though so it gets topped up fairly frequently) which is probably around 5k or so. My g/f felt bad about how dirty she let the oil in her car get, but after reading this now I know we should both be able to go longer. I think I'll do some of those tests soon.
Here's my question: I was told to avoid Quaker State and Penzoil because they have wax in them, which can build up in the engine (oil pump intake etc). Truth or fiction?
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Absolute fiction. God damn it. It's the year 2010 and people still say there's wax in Pennzoil? A lot of oils are made with paraffainic base stock. People just assumed that meant paraffin wax
. In fact, they are less likely to form sludge than naphthenic-based crude oils.
The myth has been around for decades. In the 50s when information wasn't so freely passed, a mechanic would see an engine sludged up. What oil was used? Probably Pennzoil, because it was the most widely used oil at the time. Therefore Pennzoil is to blame!