I'm new to the forum. All advice is much appreciated.
It is difficult for me as a non-chemist to interpret much of the information I've found while researching oils to keep my cars in good condition for a long time. One of few things that seems very clear is that Redline is almost universally considered to be top notch. So, I've put their 5W20 in my '03 Honda CRV. Its performance has not changed noticeably, but I'm justifying the expense on the assumption that it will benefit the engine greatly in the long run, preventing sludge buildup and so forth. Any contravening opinions out there? Is Redline's polyol ester basestock really that much better than polyalphaolefin? What are the pros and cons (apart from cost)?
Also, I have a '93 Corolla with 147K that I'm trying to run to at least 300K. So far so good with Valvoline MaxLife Synthetic. However, I've just found out about the deceptive marketing of most "synthetics," and I think the Valvoline uses hydrocracked (whatever that means) petroleum like Castrol. Like I said, it works just fine, but I'm considering switching to Redline 10W30 for the same reasons that I switched the Honda. But in this case my questions are different. The MaxLife advertises additives that condition seals and so forth. Would a switch to Redline not benefit seals in the same way? (Redline does not offer a different high mileage formula, just street/racing.) What other disadvantages might there be, if any?
I'm enough of a gear-head to research these things and do my own oil changes accordingly, but still basically an ignoramus, so please help me interpret the influx of information I've found.
Original Post