Do you like fully synthetic motor oil, Do you think it is worth the extra cost?

How many miles can you go between changing? I'm talking about a family car, used mostly on paved highway.Do you like fully synthetic motor oil, Do you think it is worth the extra cost?
I've used Mobil one since 1980 and all my cars have lasted at least 200,000 miles. If you remove the valve cover from an engine that has always used synthetic oil, you'll find bright, sparkling, clean, shiny metal under there! Most new car manufacturers are putting it in from the factory. You no longer need to wait to use synthetic oil on your very first oil change when you buy a car. You can go at least double the drain interval for city driving (about 7,000 miles) between oil changes conservatively, as long as your engine is operating normally. You can test the oil if you want to extend the drain intervals longer, but that's a pain and costs money. Use the OEM oil filter or a quality filter like Wix. Highway driving is the easiest on the oil and the engine will last 300,000 miles, unless maybe a timing chain finally wears or something. It protects your engine in case of loss of oil pressure too.Do you like fully synthetic motor oil, Do you think it is worth the extra cost?
I think it's a waste of money. I change my oil every 5000 miles per Toyota and I use regular motor oil.
Synthetic is the way to go! I wouldnt recomend it in a car thet leaks oil tho...its expensive. Synthetic oil doesnt break down. It maintains its viscocity (thickness) under most circumstances. It also tends to stick to the internal parts due to its chemical makeup.
It has definately made a difference in my Harley. Now I use it in all my vehicles.
Well, my husband swears by it. He uses AMSOIL in all of our vehicles; has for years. With that brand, and a 5W30 or heavier oil, you can get 25,000 miles or 12 months between changes.





The only time he wouldn't recommend synthetic is if the car was burning oil, or leaking it. At that point, it becomes too expensive to be worthwhile.





I'm including a link to the AMSOIL page, as well as a basic article on lubricants.
Yes, synthetic motor oil is the best.





15.000 miles is reccomended between changes, but you can go farther.





Mobile 1 and Amsoil are two good brands.
syntheic oil is the best i use all the time got 400 thousand miles out of a 350 ford econoline van using it motor is still running but body wore out i still see it today running around good luck:)
Yes I do.... matter of fact it gets used in my mowers, though for miles between changing, I'd recommend you have a oil analysis done, to see your limit basically before the oil wears out, engines differ, some beat the hell out of it more then others, but the synthetic oil stands up to it longer then conventional. Syns don't sludge easy, they stand up to higher heat longer, and also have better cold pumping ability (gets through the engine faster, so less startup wear) and it practically will leave the engine sparkling clean. The first poster should be warned, some toyota engines have a bad sludging problem, reason why toyota has urged synthetics more. Redline, Amsoil, Mobil 1, and Pennzoil Platinum are all top shelf synthetics, I'm leaving castrol syntec out, because its a group 3 hydrocracking petroleum synthetic, sold at true synthetic prices, when its far cheaper to produce. Its still a great oil though. Synthetics are higher, but I do beleive, and have seen, engines last longer with it and stay cleaner. Remember to not use a cheaply made and overpriced fram oil filter, use a wix.
Back in the 70's they ran synthetic 5w-30 synthetic oil in a diesel truck for 100,000 miles without changing it, and then took the engine apart - no wear. I used to change my Mobil 1 every 25000 miles. MY engine has 150,000 miles on it and doesn't burn oil. Consumer reports ran a test on taxi cabs using regular oil and the manufacturers recommendation (7500 miles between changes). At the end of 75,000 miles the engines looked new inside. Synthetic is better, so manufacturers specify changes every 15,000 miles. There is no doubt that it's better, and you can save money by changing it every 15,ooo miles.