Royal Purple: Not impressed. Show me dyno results.
#61
TECH Enthusiast
Join Date: Apr 2009
Location: Pocatello Idaho
Posts: 531
Likes: 0
Received 0 Likes
on
0 Posts
http://www.bobistheoilguy.com/motor-oil-104/
Read all of it if ya want some more technical reading. 101-201. Good stuff. Forums there are full of great stuff. Nice links Paul.
Read all of it if ya want some more technical reading. 101-201. Good stuff. Forums there are full of great stuff. Nice links Paul.
#62
That's MISTER MODERATOR
iTrader: (9)
That post mentioned that as synthetics are slicker, they don't stick to the gears or "climb" as well as regular oils. And they tend to leak past seals much easier.
As pressures, temperatures and exposure to combustion is considerably lower in a rear than engine oil, the advantage to using a synthetic in your rear is minimal.
Some posi units such as Auburn CANNOT have synthetic lube used in them.
As pressures, temperatures and exposure to combustion is considerably lower in a rear than engine oil, the advantage to using a synthetic in your rear is minimal.
Some posi units such as Auburn CANNOT have synthetic lube used in them.
#63
10 Second Club
iTrader: (4)
Ive been running Redline 10-30 for almost 8 years, it started at 370 rwhp, up to 502 rwhp. I would say out of the 46,000 miles I did (24,000 when I got it), and over 1000 passes at the strip (when I was young and stupid I would go to the track and run back to back all day almost, 27 passes once) and never had trouble, at all. Also had probably over 100 dyno pulls. The last setup routinely saw 7500 rpm, and never so much as a hint of trouble. Every day I drove it it would see 7000+ at least 5 times. It finally got killed by a clutch that blew apart and ripped the starter off the block, opening up the water passages and cracking under the headbolts. When I disassembled I had 1 bearing that wore a little bit more than the others, but not terrible, and not ready to go, at all. That pretty much makes me a customer of theirs for life.
Other than for break in, it's in my 366 ls2 now as well, seeing 7900 rpm on a daily basis....
Other than for break in, it's in my 366 ls2 now as well, seeing 7900 rpm on a daily basis....
#64
Resident Racing Jerk
iTrader: (1)
Join Date: Dec 2002
Location: sc
Posts: 647
Likes: 0
Received 0 Likes
on
0 Posts
in situations such as a clutch type limited slip diff or auto transmission clutches, a synthetic can inhibit some of the friction needed to function correctly. that is hearsay though, i have not used synthetic trans fluid, but i have used it in a rear diff and had issues with chatter in turns. went back to conventional gear oil/additive and it did fine.
#65
11 Second Club
iTrader: (1)
I agree about the wiper blades comment, that and head light bulbs BEFORE they burn out.
I bought a few things from Molakule back in the day, still have almost a pint of his air tool oil.
Far as synthetics in a diff. the only downside I know of is clutch posis don't agree with some oils. The pressure between the meshing gears is substantial.
I bought a few things from Molakule back in the day, still have almost a pint of his air tool oil.
Far as synthetics in a diff. the only downside I know of is clutch posis don't agree with some oils. The pressure between the meshing gears is substantial.
#66
On The Tree
I found a few things.
I guess that's the advantage of living in a small town with a big business including a good sized refinery.
When I mentioned earlier that oil didn't wear out I wasn't talking about contaminants. I was trying to keep this on a car forum level as opposed to a Petrochemical Engineering white paper. I really meant to say that the base stock doesn't wear out. If it were possible to remove all contaminants oil could last indefinitely. I still use synthetic because of the reasons listed in my earlier post.
The ability of oil to stick to a rotating gear is primarily related to viscosity and at room temp the Dino oil in a differential will have a thicker film strength than a synthetic. At 200 degrees F the synthetic will lubricate better as it will be "thicker" than the mineral based oil which thins out significantly with temperature increases. I still use 80W90 in my differential and have never had a problem.
I've also ran Valvoline 10W30 in my 1989 Silverado for the last 248,000 miles and the engine is perfectly clean and makes no more noise than a new engine. It's been changed every 4000-6000 miles pretty religiously. The Vette and the Impala run hotter and I feel that synthetics are best in those applications. Of course that's just IMHO.
Last edited by 1963SS; 11-25-2011 at 09:35 PM.
#68
Resident Racing Jerk
iTrader: (1)
Join Date: Dec 2002
Location: sc
Posts: 647
Likes: 0
Received 0 Likes
on
0 Posts
well, that depends.... cup cars have a pump/cooler setup for the rearend. 800+hp and 9,000 rpms with 4.88 gear will create a ton of heat in the rear. driving to walmart with a 2.73 rear will not.
#71
TECH Enthusiast
iTrader: (22)
Join Date: May 2007
Location: DFW, Tx
Posts: 739
Likes: 0
Received 0 Likes
on
0 Posts
Im pretty familiar with a few of the baddest big cube motor builders in the area...guess what they use in thier $30-$50k motors....Castrol GTX 20-50.
If that doesnt tell you something Im not sure what will
If that doesnt tell you something Im not sure what will
#72
TECH Fanatic
Join Date: Oct 2006
Location: POULSBO WA.
Posts: 1,106
Likes: 0
Received 0 Likes
on
0 Posts
So to sum up are we talking synthetic in the engine( brand x) synthetic trans (brand x) and regular 80/90 for the diff. Is there any reason not to run syn in the trans? At the track in the summer time is when i get concerned with the exsessive heat, syns breakdown alot higher than regular atf like regular is what 280? How high would be syn in trans be?
#73
That's MISTER MODERATOR
iTrader: (9)
I would say, yes, you've got it correct. Synthetic in the engine & transmission & dino squeezings juice in the rear.
As lubricants can be a touchy subject and most people are passionate about what they believe is the best, simply using decent oils and filters with regular changes should be all that's needed to have a healthy car. I don't think there's any oils or filters on the market that will cause harm to your ride. Except most Fram filters, that is. Additives are also usually a no-no.
As lubricants can be a touchy subject and most people are passionate about what they believe is the best, simply using decent oils and filters with regular changes should be all that's needed to have a healthy car. I don't think there's any oils or filters on the market that will cause harm to your ride. Except most Fram filters, that is. Additives are also usually a no-no.
#74
8 Second 6 Speed Director
iTrader: (6)
Join Date: May 2002
Location: windsor, ont. canada - Home of the fastest LT1 6spd.
Posts: 3,293
Likes: 0
Received 1 Like
on
1 Post
i guess i am spoiled, up until recently, (as of last week) i have worked for one of the big three at the corporate level in the Powertrain division on current and advanced programs.
some of the testing perfomed as a part of development specifically for some of the "performance platforms" is pretty severe. synthetics provide the required protection for different types of drivetrain components to pass the required life cycles as a part of prodcutcion validation testing.
i do plan on trying the Joe Gibbs oil next year! my engine builder has had numerous engines on the dyno, well it is what he is putting in his big block, which makes well over the 4 digit mark on motor.
again, just adding my .02
some of the testing perfomed as a part of development specifically for some of the "performance platforms" is pretty severe. synthetics provide the required protection for different types of drivetrain components to pass the required life cycles as a part of prodcutcion validation testing.
i do plan on trying the Joe Gibbs oil next year! my engine builder has had numerous engines on the dyno, well it is what he is putting in his big block, which makes well over the 4 digit mark on motor.
again, just adding my .02
#75
TECH Senior Member
iTrader: (8)
in situations such as a clutch type limited slip diff or auto transmission clutches, a synthetic can inhibit some of the friction needed to function correctly. that is hearsay though, i have not used synthetic trans fluid, but i have used it in a rear diff and had issues with chatter in turns. went back to conventional gear oil/additive and it did fine.
#77
Al 95 Z28