Good oil for 94 suburban??

961kyle

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Bought a 94 suburban with 180000 miles on it awhile back and coming up on my first oil change. Any thoughts on what type of oil to use. I have heard synthetics can cause problems in older vehicles with alot of miles. The guy i bought it from used some Northland Synthetic blend. Cheap oil in my opinion but should i stick with that or try something else? Any ideas appreciated. I have the 5.7 engine.
 
Bien au contraire, ça peut juste améliorer le rendement du moteur....

J,ai fait le changement sur mon chevy-van et mon suburban 1993-95 et c,est extraordinaire..

Lorsqu,il y a un problème, c,est qu,il y a un gasket qui est défectueux, a par ça c,est o.k...
 
I have a 1997 suburban with 150,000 miles and I recently tried to run a dura blend in mine (it has always had conventional before). It sprung oil leaks all over the place. I switched back to conventional and it seems to have helped clog up the leaks, but it still leaks a bit. It's very frustrating.

My advice: unless the vehicle has always run synthetic, I would not recommend switching on a vehicle with that many miles. You'll likely end up with an oil fountain!
 
Comme je disais précédement, lorsqu'un véhicule a pas de joint un peut ouvert, alors y a pas de problème a mettre cette huile synthétique, mon suburban 1993 affiche 295,kms....j,ai fait le changement a l,huile synthétique et aucun problème...

C'est sur que si tu fait le changement et que ça coule comme une fontaine, alors tu as le choix, sois tu change les joints ou bien tu revient l,huile précédent..
 
Bought a 94 suburban with 180000 miles on it awhile back and coming up on my first oil change. Any thoughts on what type of oil to use. I have heard synthetics can cause problems in older vehicles with alot of miles. The guy i bought it from used some Northland Synthetic blend. Cheap oil in my opinion but should i stick with that or try something else? Any ideas appreciated. I have the 5.7 engine.

Just use a conventional oil and add a can of http://www.restoreusa.com/Engine_Restorer.html to help the engine keep it's compression up in the cylinder's. You engine has to many miles on it to just start using synthetic oil. Save your self some money and keep up with the oil changes at 3,000 miles or 5,000 KM and add a can of Restore. :D

1994 GMC TRUCKS SUBURBAN 5.7L 8-cyl Engine Code [K]
Engine Oil Grade 1......API* Above -18C......10W-30 / All TEMPS......5W-30 SAE 5W-30 is preferred.

1988-99 models
Do not use synthetic lubricant in axles using RTV sealant.
Synthetic lubricant will chemically attack RTV sealant.
American Axle has only approved the use of Synthetic
Lubricant 75W-90 GM part no. 12378261, as follows:
a. All 8.6 inch rear axles are compatible.
b. All 9.5 inch rear axles built before mid-February 1998
(RTV sealant used to seal cover pan) are not compatible
c. All 9.5 inch rear axles built after mid-February 1998
(equipped with cover pan & gasket) are compatible.
d. All 10.5 inch rear axles built prior to March 3, 1999 are
compatible if axle shafthub RTV sealer is replaced with GM
gasket part no. 327739.

CAPACITIES:
Engine, W/ OOP, with filter..........7.5 liters
Engine, W/O OOP, with filter..........4.7 liters

TORQUES:
Oil Drain Plug.....20 ft/lbs
 
would Lucas Oil Stabalizer do the same thing as the Engine Restorer?
 
would Lucas Oil Stabalizer do the same thing as the Engine Restorer?

Nope, Lucas Oil Stabilizer adds fluid retention to the engine oil. Fluid retention to the oil is a good thing and keeps the oil from thinning out causing it to foam up, the Engine Restorer has small particles in with the fluid and fill up any gaps in the cylinder walls in your engine to bring up the compression in all the cylinder within one another giving your engine a more balanced compression ratio from all your cylinders. It would not hurt for you to add both additives together if you have high miles to your engine. I do use Engine Restorer and Lucas to my Jimmy and yes it has over 365,000 miles and still going strong, (on borrowed time :D) and i do use them both on my wife's Montana and it does keep the engine from making the piston slap when first started in the morning or after it has sat for a few hours. :D Keep me posted if you have anymore questions. Be glad to help you decide on anything your not sure of, I may have tried it or broken it. :eek:
 
ok thanks, i will run this by you then and see if it would work. suburban takes 5 qts. of oil, (180000 miles), would it be a good idea to use 1 can of restore, 1quart of lucas and fill the rest with regular conventianal oil? Also is there any advantages to the "high mileage oils" on the market?
 
ok thanks, i will run this by you then and see if it would work. suburban takes 5 qts. of oil, (180000 miles), would it be a good idea to use 1 can of restore, 1quart of lucas and fill the rest with regular conventianal oil? Also is there any advantages to the "high mileage oils" on the market?

1 can of Engine Restore and you'll not need to use as much as 1 quart of Lucas engine oil supplement. You only need 5% to 15% of Lucas engine oil treatment, depending on the condition of your engine. One of the best things to do is to add 1 bottle of Marvel mystery oil about 500 to 1000 miles before you change your engine oil. The Marvel Mystery Oil will dissolve all the carbon and sludge that is build up in your engine, freeing up the oil journals through out the motor.:D

There is a draw back to this, if your engine is really dirty internally. It may mess up your oil pressure sending unit for a few days, but it i find that to be far and few cars that it happens to. It may read High at first start up then go back down to the proper readings. Once the oil and filter has been replaced things go back to normal and you may notice a better running engine.
:rolleyes:

As for running the high mileage engine oil to conventional, the high mileage engine oil has a higher fluid retention like add Lucas to your oil. With the cost difference, your better off just running a Conventional Engine Oil Grade 1......API* and I believe your Suburban is a 5W-30 recommended and just add the Lucas oil treatment.

Once your drain you engine oil with the Marvel Mystery Oil in it, inspect your engine oil and you'll notice how much carbon has come out, a few more Mystery Oil treatment before oil changes will help keep your engine running clean as possible. What this does is help keep the pick up screen at the bottom of the oil pump from getting plugged up with sludge and carbon which will in turn restrict the oil flow towards the oil filter and main bearings. :)

Working at the speed shop in Cape Cod MA, we always used the Marvel Mystery OIL before we changed the oil and filter in our own cars, Restore with a little Lucas added with the new oil. what we found it that the internal engine parts are cleaner and that any piston slap during warm up as gone. The other thing is famous for our engine is the valve guilds seeping oil in to the cylinders over night is gone and any blue smoke during engine start ups may be gone. Keep me posted, oil and filter should be changed every 3,000 to 5,000 miles.

A good way to know if you have enough Lucas mixed in with your engine oil is to pull the dip stick out and touch the end and feel the oil between your fingers and see if it's tacky when you try to separate your fingers. Your fingers will slide easily, but when you try to separate them apart. You should feel the oil tacky which is what your bearings and internal engine parts will have, a constant coating of oil. (mix the Lucas in with the jug of oil, it's easier :D)
 
i got a 99 5.7 suv and im doing a diesel conversion because of gas. i found 2 cars both for 800. a 1983 suv 6.2 and a 92 6.2 gmc van. which will be better for the swap and will they fit? is a 6.2 good on diesel or should i go with a small motor?

The only problem you may run in to after you get the engine running is having the Suburban to pass the emissions. The 83 and i believe the 92 diesel are both running mechanical fuel pump system and the emissions are different on those engines then the 1999 Suburbans. When you have tog o for your drive clean program, you may find that your not going to pass emission standards for the 1999 Suburban diesel engines and that's what there going to base your tuck on cause it's manufactured for that year. :eek:

http://www.dieselnet.com/standards/intro.html
 


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