quote:I can think of one scenario: It's 25 degrees F below zero, he cranked the car (a miracle in itself with this weight oil) and immediately took off, redlining it in every gear.
Originally posted by Dr. T: What about the post that said "years back, I killed my Corolla by using 20-50. How?
quote:Very good point to think about when stories about the older oils are told. I'm glad modern pour point depressants are often PAO.
Originally posted by Pablo: Most of the early viscosity improvers and pour point agents were not exactly stable. So in a nutshell it was a nasty cycle. When the oil gets hot the pour point agents (solvents) evaporate off - so the oil thickens with age - then when you need those thining agents (cold weather) the oil is even thicker so more wear....and some of these API 20W-50 oils even got so bad they indeed would turn into black tar of death -
quote:Hey, even I have relaxed a bit on viscosity. I changed the oil in by wife's truck last week from M1 15w50 to Redline 10w40. I plan on doing the same on my crusty '88 civic. I hope switching to an ester based oil after running a PAO oil after 200k isn't a problem. Now I need to convert an old Suzuki to Redline and M1 is out the door. Too bad really, I sure liked the MX4T. IMO it is the best Mobil oil product.
Originally posted by sprintman: 20W50 still the biggest seller in Oz but X/40W probably will take over soon. Hey I even went to a 10W30 Pennzoil for Auto-Rx cleaning, was pretty apprehensive when I poured it in!
quote:Shannow, no need to recall until "back when..." Right now, today, Australian Market versions of most cars, have manuals that specify the use of motor oils heavy enough to make Americans freak out. I think they start out at 10W-40, with instructions to use 20W-50 not uncommon. And these are the same engines many people claim are "made for 0W-20, 5W-20 oils." Could it be because it is a Las Vegas desert type environment Down Under? When I was in Vegas last month, I noticed that 10W-40 was very prominent on the shelves, and 5W-30 nowhere to be seen. In NY, you have to look hard to find the 10W-40, if you even find any at all. I'm talking mineral oil. Didn't bother to look at the syn's.
Originally posted by Shannow: Was doing some thinking today regarding thicker oils. Back when they were first released downunder, there was a lot of hype about the new "Made for Australia" oils that were ridiculously thick (35W-70 was a common one). Even the big oil companies make a 25W-60 for older cars.
quote:I have the same car as you. 50wt seems to be good for this engine. http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=3;t=000168 Cant get anything less than a 40wt here in hot tropical Singapore.
Originally posted by pruntyc: When I bought my Toyota Camry, in Jan 2000, 4 not a 6. The dealer told me to put 10W30, into it. I asked him if he ever read the manual, for it says 5W30, and the oil cap says the same. I live in MS, and he told me, that it was for cold places not down here. Of course the car company is saying for all places, but he said he didn't even know where one could buy 5W30, so I told him WalMart, for I use it in another car. My grandfather ran 10W oil all the time in his cars in Ohio, and got over 100,000 out of them, in the 40's back when you had to over haul a car around 70,000, but he never had to. They were still in good shape even over 100,000. So I think thin is probably better.