Full synthetic engine oil comparison: Mobil 1 vs Castrol
#21
Melting Slicks
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Re: Full synthetic engine oil comparison: Mobil 1 vs Castrol (LemansBlue68)
Use a decent SG or better rated "dino" oil and change it every 3000 miles. You'll do just as well as any synthetics and pay 1/4 of the cost. If you want to run synthetics, you should still change your oil every 3000. So if you want to pour that extra $3/qt down the drain all the power to ya if it makes ya feel better. The biggest factor that I've seen with respect to wear and carbon accumulation in the 100K+ fleet motors that I've looked at (and we run 'em all over the country) is the regularity of the oil changes--synthetic oil or not.
When Mobil 1 first came out, they touted that you could extend your oil changes out to 25,000 miles. They back peddled on that statement really fast when customers started taking them literally.
When Mobil 1 first came out, they touted that you could extend your oil changes out to 25,000 miles. They back peddled on that statement really fast when customers started taking them literally.
#22
Premium Supporting Vendor
Re: Full synthetic engine oil comparison: Mobil 1 vs Castrol (BeaterShark)
I've read that Mobil 1 tends to shrink seals. Amsoil on the other hand does not. Also heard that GM is having some problems w/Mobil 1 in the newer vettes because it's consuming the oil. Any thoughts on this.
#23
Re: Full synthetic engine oil comparison: Mobil 1 vs Castrol (Van Steel)
i use synthetic in anything that i would beleive is worth over 3000 dollars, enginewise. whether thats because its original or because its a good buildup. ive never heard problems with mobil one shrinking seals. id reccomend royal purple all the way though. ive liked all their products, which includes a lot of synthetic juices. if you want synthetic oil but dont want to pay the mobil one price, go with royal purple.
#24
Race Director
Re: Full synthetic engine oil comparison: Mobil 1 vs Castrol (Van Steel)
I've read that Mobil 1 tends to shrink seals. Amsoil on the other hand does not. Also heard that GM is having some problems w/Mobil 1 in the newer vettes because it's consuming the oil. Any thoughts on this.
I don't know where the 3k mile oil change comes from. It makes no sense. Maybe in the 50's, but not today. I change at 7k miles and that is probably too often. I'll probably try 10k miles and send it in for analysis.
#25
Re: Full synthetic engine oil comparison: Mobil 1 vs Castrol (Van Steel)
Any of the PAO fluids will dry out seals if not mediated with other chemistry in a formulated oil. Mobil's Supersyn does not cause seals to dry out . In fact I have personally seen some quite high milaege engines changed over without any problems.
By chance did a Amsoil Saleman tell you this about the Mobil :D
The new Vettes/Camaros have the ring package located too high on the piston and use a thin ring with light tension and a piston that tends to rock. Those problems in the inherit design will allow any motor to use a lighter VI oil like the Mobil SS 30wts . It is obvious the piston can rock when you hear some of these hammers start up cold .
If I owned one I would not burn good synthetic oil-- If I bought the car new I would place in the part of the Generals body that it belonged if he would not repair it
Whoooooa! :smash: :p:
By chance did a Amsoil Saleman tell you this about the Mobil :D
The new Vettes/Camaros have the ring package located too high on the piston and use a thin ring with light tension and a piston that tends to rock. Those problems in the inherit design will allow any motor to use a lighter VI oil like the Mobil SS 30wts . It is obvious the piston can rock when you hear some of these hammers start up cold .
If I owned one I would not burn good synthetic oil-- If I bought the car new I would place in the part of the Generals body that it belonged if he would not repair it
Whoooooa! :smash: :p:
#26
Premium Supporting Vendor
Re: Full synthetic engine oil comparison: Mobil 1 vs Castrol (zwede)
Zwede
That makes good sense. Like i said thats just what i've heard. My father and i use Amsoil in all of our cars and trucks. We have a 80 Vette, 70 Monte Carlo, 97 S-10 Blazer and a 00 dualle deisel. We've had no problem whats so ever w/Amsoil. Thanks for the input. :thumbs:
That makes good sense. Like i said thats just what i've heard. My father and i use Amsoil in all of our cars and trucks. We have a 80 Vette, 70 Monte Carlo, 97 S-10 Blazer and a 00 dualle deisel. We've had no problem whats so ever w/Amsoil. Thanks for the input. :thumbs:
#27
Le Mans Master
Re: Full synthetic engine oil comparison: Mobil 1 vs Castrol (MELVIN)
Ditto Zwede and Mountainmotor on the problems with C5 engines. It was worse in engines that were driven at higher RPM before they were fully warmed up. Part of the fix was a change to the ring configuration to change the scraper on the ring package.
I read somewhere that the recommended 3,000 mile oil change had some validity in the days of leaded gasoline, carbureted engines and toilet tissue oil filters since carbureted engines frequently squirted excess gasoline down the cylinder walls that ended up in the crankcase, leaded gasoline burned a lot dirtier and oil filters didn't filter nearly as well as current, high quality filters.
No one doubts that oil changes at 3,000 miles keeps cleaner oil in your crankcase. But, with a fuel injected engine burning unleaded gas and a high quality oil filter, extending that interval to 5,000 or even 10,000 miles is probably "safe". Using Mobil 1 is an extra margin above that..........
I read somewhere that the recommended 3,000 mile oil change had some validity in the days of leaded gasoline, carbureted engines and toilet tissue oil filters since carbureted engines frequently squirted excess gasoline down the cylinder walls that ended up in the crankcase, leaded gasoline burned a lot dirtier and oil filters didn't filter nearly as well as current, high quality filters.
No one doubts that oil changes at 3,000 miles keeps cleaner oil in your crankcase. But, with a fuel injected engine burning unleaded gas and a high quality oil filter, extending that interval to 5,000 or even 10,000 miles is probably "safe". Using Mobil 1 is an extra margin above that..........
#28
Instructor
Re: Full synthetic engine oil comparison: Mobil 1 vs Castrol (BeaterShark)
If you want to run synthetics, you should still change your oil every 3000.
And that is less that a gallon of oil for a turbocharged engine (no, it`s not diesel)
by the way I am using Castrol RS 10W60 Fully synthetic (very turbo friendly)
#29
Le Mans Master
Re: Full synthetic engine oil comparison: Mobil 1 vs Castrol (Pacha)
83 toyota supra that I run hard as hell and have since new....it has 309,000 miles on it, motor never apart, change oil every 5-6K with regular dino, no syns for me. :D but to each his own,do what spins your crank or make you :)