quote:I have QS 20w-50 in my 1973 pickup and planned on a UOA for you guys soon........Until gas went up over $2.00 a gallon. Truck gets 6.1 mpg so it'l be a while till I get enough miles on it for the UOA. Only got 1000 miles on it so far.
Originally posted by csandste: I don't think there's any proof that QS is in anyway a bad oil. Despite its being the number 2 seller, there's been little use on this board
quote:Wait. I believe most 10w40s do not carry the starburst, nor do most of the so-called "high mileage" oils. I do think you have to watch the rating. SH may be better for higher ZDDP, but on other factors SL is probably best. So probably ok with just the SL and not to worry about the starburst?
Originally posted by mikemc: Avoid anything that does not carry the API starbusrt and SL rating.
quote:As far as overrated AND mediocre, and for price, some of the full synthetics fall into that category. Browse through the UOA section and see that some of these oils, while commanding a premium price, often reveal less than mediocre results, indicating to me at least, they're not nearly capable of the drain intervals as advertised.
Originally posted by moontan: what are the real motoroils to avoid,dinos-semisynths-fullsynths etc.what is proven to be overrated or mediocre....
quote:Yes it has the API doughnut with the SJ/SL service rating in it, but not the words "Energy Conserving" that is found on regular 10w30, such as Valvoline Durablend; nor does the Maxlife have the API starburst. I have seen "High Mileage" oil that does note even have the donut (Quaker State I think), but I believe somewhere on the can says it meets or exceeds the SJ rating (apparently they don't want to pay for the license to have the donut). And I certainly would not let the lack of starburst or donut stop me from buying an oil, provided I trusted the company to come through with the goods. I would not buy off-brand that way (or at all if I can help it). In fact, I make a point of not buying any oil with the starburst--all it means is you are buying a politically correct oil! The dount is OK though, but again not the PC Energy Conserving. To the PCs fuel economy comes before engine life. [ March 03, 2004, 08:50 AM: Message edited by: TallPaul ]
Originally posted by Thomas Pyrek: Valvo Max Life 10w-30 has the API SJ/SL stuff.