Thoughts on synthetic oil

[Northern300c]

Originally Posted by Chase300

Redline rules in my book. I too can't justify using it over Mobil1 given my oil change intervals.
I use their MTL in my manual gearboxes and it makes them shift like a hot knife into butter. I would not use any other oil in a manual trans and I've tried many different brands.
I also use Redline oil in the rear diff., but have also used Mobil 1 as its much easier to obtain.

Couldn't have said it better myself. Redline has great diff and tranny fluids for sure. Their oil on the other hand is awesome, but as you said, the price difference doesn't really mean it protects twice as much.

I think my rear diff will be swapped over to redline in the near future.

Also try their Redline SI-1 Complete Fuel system Cleaner. I use it twice a year in a full tank and it cleans up any deposits and it is pretty cheap and easy to find.

[Northern300c]

Originally Posted by chuckkent

Hey, I'm done..if you want to feed from Northern's table of ignorance its a free country. This thread is way too long!!!!!!!

I think you might want to stand in front of a full length mirror and you will clearly see the true definition of ignorance.

[chuckkent]

Recommended High Speed Pressure & Load Capacity Adjustments

For H-Speed Rated Tires

Vehicle Top Speed Required Tire

H-Speed Rated Tire 35 psi O.E. Example

mph km/h psi
100 160/100 35
106 170/106 36
112 180/112 37
118 190/118 38
124 200/124 39
130 210/130 40

[kevenj]

Originally Posted by Northern300c

Royal purple is more marketing than really good oil.

Redline on the other hand is a true PAO Group 5 synthetic oil and is believed to be the best out there. Mind you, it comes at a cost which in my opinion doesn't relate to a better protected engine.

Royal Purple is a PAO (Polyalphaolefin- -as is Amsoil) but PAO is Group 4 not Group 5.

Group 5 is NOT PAO based, but is a true synthetic as well:

Synthetic oil - Wikipedia, the free encyclopedia

[bund]

Originally Posted by Northern300c

Seeing most are group 3 synthetics now, all of them are practically the same in most conditions.

The only differences are if you go up the the Group 5 PAO based oils that are really expensive and don't offer the protection difference for the price.

I believe Amsoil is still a PAO 5 oil as mentioned a number of times earlier in this thread.

[Chase300]

One last thing on this synthetic discussion you all may know or maybe only some are aware of.
The 300C comes from the factory with synthetic oil in the transmission and rear end. Mopar ATF+4 is a synthetic oil as is the 75W140 mopar rear diff oil.

The Mopar 75W140 rear diff oil is also the world's most expensive oil....its around $25/qt.!!! Redline is 1/2 the cost!

[Northern300c]

Originally Posted by kevenj

Royal Purple is a PAO (Polyalphaolefin- -as is Amsoil) but PAO is Group 4 not Group 5.

Group 5 is NOT PAO based, but is a true synthetic as well:

Synthetic oil - Wikipedia, the free encyclopedia

Wikipedia is NOT an encyclopedia and isn't the place where I would get oil information from.

PAO oil is a Group 5 oil. And Royal Purple is mostly Group 3 with only a small portion that is Group 5 as an additive, but it is not the basestock.

Amsoil and Redline are currently the others that are PAO based and now even Mobil 1 is Group 3.

[Northern300c]

Originally Posted by chuckkent

Recommended High Speed Pressure & Load Capacity Adjustments

For H-Speed Rated Tires

Vehicle Top Speed Required Tire

H-Speed Rated Tire 35 psi O.E. Example

mph km/h psi
100 160/100 35
106 170/106 36
112 180/112 37
118 190/118 38
124 200/124 39
130 210/130 40

1.) Our tires are not a 35psi based tire. They are 30 psi for the car, and 32psi for the tire manufacturer. No where does any where state that we have a 35psi base tire.

2.) WHO THE HELL HERE DRIVES OVER 100MPH GOING DOWN THE HIGHWAY!!!!

[Northern300c]

Originally Posted by bund

I believe Amsoil is still a PAO 5 oil as mentioned a number of times earlier in this thread.

my mistake, you are completely correct! Just forgot to mention it.

[Northern300c]

Originally Posted by Chase300

One last thing on this synthetic discussion you all may know or maybe only some are aware of.
The 300C comes from the factory with synthetic oil in the transmission and rear end. Mopar ATF+4 is a synthetic oil as is the 75W140 mopar rear diff oil.

The Mopar 75W140 rear diff oil is also the world's most expensive oil....its around $25/qt.!!! Redline is 1/2 the cost!

ATF+4 is not synthetic in any way shape or form. It just has a different additive package than Dextron/Mercon.