- Joined
- Dec 30, 2006
- Messages
- 29,558
Yeah,they were the fastest production cars in the US.
Oil recommendations for 1987 Buick Grand National
- Thread starter spiderbypass
- Start date
- Status
Yeah,they were the fastest production cars in the US.
These cars share the same motor as the 89 Turbo Trans Am's I believe.
Mobil 1 was factory fill for the Trans Am's. Not sure what factory fill was for the GN's.
I have friend who has both an 89 TTA, which he uses Mobil 1 in, and an 87 GN which I believe he also uses Mobil 1 in. TTA has 25k miles, GN has 45k miles, both developed rear main seal leaks which he tells me is VERY common in these cars. Not sure if oil selection is a contributor.
Mobil 1 was factory fill for the Trans Am's. Not sure what factory fill was for the GN's.
I have friend who has both an 89 TTA, which he uses Mobil 1 in, and an 87 GN which I believe he also uses Mobil 1 in. TTA has 25k miles, GN has 45k miles, both developed rear main seal leaks which he tells me is VERY common in these cars. Not sure if oil selection is a contributor.
Fastest in the 1/4 mile, then the Vette caught up.
I'm running Redline 15W-40 in my GN right now, with a bottle of VSOT. I like the idea of a thicker oil in a turbo application(but I could be wrong, who knows). I know of guys who run everything from 5w20 to 20w50 in their GN's. I think what we all agree on is a high ZDDP content oil, or an additive that boosts these numbers. Good luck with the car, they are a blast to drive.
I've also got an 87 GN - bought it new and stills looks it. I used conventional oil for the first 10k than syn oils all the way to now. It has 57,000 miles now. I used Mobil 1 up to about 40k and now use Redline and will continue to. Don't go real thick - too many people make the mistake of running a 15W/50 - too thick and just not needed. Plus it slows the turbo spool up time a wee bit. I'd use Mobil 1, Redline or any syn oil you prefer and go with it. I also run Mobil 1 tranny fluid, bu the way, with good results.
The j/c I took all of my auto classes had a prototype Grand National donated by G.M.with an off road emision sticker under the hood ,they are very easy to work on and have lots of power .Syn oil ?? not unless you plan to nascar race or run on the autobahn. It is probably the best hot rod G.M. put on the road other than the 1969 Z28 Camaro.
I wouldn't pay $80k for anything G.M. The heart break of America. Their advertising slogan says it all.
Only because the GN went away...
Wouldn't a new Grand National based off the Z06 be cool? Forget about a Buick only drive train but who cares. A sinister all blacked out car with some vintage 80's cues (square tailights etc.) Yummy!
BTW I saw an owner of a C5 vette "get on it" for the first time the other day! I was immpressed since they always seem to be putted around in.
No rumors. That is 100% correct. GM's higher ups were not happy that a little V6 could beat up their top of the line Corvette. The same thing happened again when the Turbo TA came out a couple of years later and once again when Syclone S10 came out a few years after it. Gotta love turbos.
I'd run Mobil 1 15W50 in it. The oil in those cars takes a beating from the turbo heat and also because the stock Buick oiling system is less than perfect for such a perfomance oriented car. It needs a thick, high quality synthetic in it to help keep it alive under extreme conditions.
The Grand Nationals & the GN-X are the best. I always spend the most time drooling over them at car shows.
Does anyone know the the differences (Specs) between the regular GN and the GNX?
The GN-X has 17" rims, flared fenders, the air-vent thing on the fender. It also sported an intercooler, higher boost from the turbo, and upgraded pistons and crank. And a much higher price tag.
http://en.wikipedia.org/wiki/Buick_Regal#Grand_National_and_GNX
http://en.wikipedia.org/wiki/Buick_Regal#Grand_National_and_GNX
- Joined
- Dec 30, 2006
- Messages
- 29,558
I agree. Run Mobil 1 15W50 (regular Mobil 1 and not the Extended Performance.....you can get it at Walmart for $22 for the 5 quart jug) and a Mobil 1 oil filter.
I have noticed various diesel oils both synthetic and nonsynthetic recommended for the Grand National. Are there certain advantages a diesel synthetic oil would offer compared with other synthetics?
Well, you had 'da man tell you what he would start with so I would go with that. A better detergency package is one cornerstone of a good, diesel-rated oil.
ToyotaNSaturn, Care to try again?
- Status
Similar threads
