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1982 Trans am 84K miles Oil recomends ?? #4459775
07/15/17 12:13 AM
07/15/17 12:13 AM
Joined: Jul 2017
Posts: 584
OKLAHOMA
GMguy84 Offline OP
GMguy84  Offline OP

Joined: Jul 2017
Posts: 584
OKLAHOMA
Okay now the trans am's turn lol


This is my pleasure (TOY car) only drive it few times a month in nice warm weather most of the time its parked in garage


It has factory dual TBI 305 crossfire and 84K miles. It does have low oil PSI and leaks


Last oil change was Mobil 5000 semi-syn with a WIX oil filter and 25% lucas oil stabilizer. Haven't done oil change on it since Spring 2016


On the next change, I'm thinking of the harvest king (Atwoods) 10W30 full syn with mobil 1 oil filter ??


Any recommendations ?? Mobil 1 website for this year/model recommends 15W-40 oil ??? crazy


05 Silverado Z71 5.3 Mobil 1 EP 10W30/FUG XG3675

01 Suburban 5.3 Mobil 1 AP 5W30/FUG XG3675

1982 TRANS AM (KITT) Mobil S5K 10W40/M1-302A
Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84] #4459778
07/15/17 12:40 AM
07/15/17 12:40 AM
Joined: Oct 2014
Posts: 13,298
Canyon County Idaho
CT8 Offline
CT8  Offline

Joined: Oct 2014
Posts: 13,298
Canyon County Idaho
15W-40 would work well.The M1 filter is not needed,


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84] #4459784
07/15/17 01:01 AM
07/15/17 01:01 AM
Joined: Oct 2015
Posts: 2,931
Balearic Islands , Spain
FordCapriDriver Offline
FordCapriDriver  Offline

Joined: Oct 2015
Posts: 2,931
Balearic Islands , Spain
If it's leaking oil and does not have great oil pressure i would run Valvoline Maxlife 10W-40.
GM specififcally said that 10W-40 should not be used in the SBC, but that was because back in the day most 10W-40 Dino oils would shear a lot and the shearing of the high amounts of viscosity index improvers would form deposits inside the engine etc etc etc, but nowadays that has been adressed, so it would be an ok choice.


1975 Ford Capri II Ghia 3000 V6, - Shell Helix HX3 20W-50 w/ 20% Rimula R4X 15W-40 HDEO.
1988 Ford Escort XR3i Cabrio, - Shell Rimula R4X 15W-40, w/ 30% Helix 3 20W-50.


Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84] #4459790
07/15/17 02:01 AM
07/15/17 02:01 AM
Joined: May 2012
Posts: 6,158
Fort Lauderdale, FL
DoubleWasp Offline
DoubleWasp  Offline

Joined: May 2012
Posts: 6,158
Fort Lauderdale, FL
If your engine has low psi on MS5k with 25% Lucas, then you should run a 20/50. You can't ask for better than Valvoline VR1.


07 Lincoln Navigator M1 0w-40/FU
68 Charger R/T / Supercharged 440 VR1/DBL7349
07 Ram 3500 4x4 / Cummins 6.7 /DBL7349
17 Maserati GranTurismo Cabrio
Re: 1982 Trans am 84K miles Oil recomends ?? [Re: DoubleWasp] #4459795
07/15/17 03:13 AM
07/15/17 03:13 AM
Joined: Jul 2017
Posts: 584
OKLAHOMA
GMguy84 Offline OP
GMguy84  Offline OP

Joined: Jul 2017
Posts: 584
OKLAHOMA
Ya my mechanic who builds LT1 race engines Uses VALV VR1 20W50 in his '94 Camaro LT1 race car. But I feel thats alittle to much.


I just noticed Atwoods has 15-40 Lucas HD magnum for a nice price $16 !!! would this be okay to use ??


Dave




Last edited by GMguy84; 07/15/17 03:19 AM.

05 Silverado Z71 5.3 Mobil 1 EP 10W30/FUG XG3675

01 Suburban 5.3 Mobil 1 AP 5W30/FUG XG3675

1982 TRANS AM (KITT) Mobil S5K 10W40/M1-302A
Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84] #4459803
07/15/17 03:46 AM
07/15/17 03:46 AM
Joined: Oct 2015
Posts: 2,931
Balearic Islands , Spain
FordCapriDriver Offline
FordCapriDriver  Offline

Joined: Oct 2015
Posts: 2,931
Balearic Islands , Spain
Lucas oils have been found to be pretty mediocre, i wouldn't use it, use something like Valvoline Maxlife or Shell Rotella.

VR1 is a great oil but the 20W-50 will be too thick for your 305 TBI, it would only make you lose performance and fuel economy.


1975 Ford Capri II Ghia 3000 V6, - Shell Helix HX3 20W-50 w/ 20% Rimula R4X 15W-40 HDEO.
1988 Ford Escort XR3i Cabrio, - Shell Rimula R4X 15W-40, w/ 30% Helix 3 20W-50.


Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84] #4459810
07/15/17 04:41 AM
07/15/17 04:41 AM
Joined: Feb 2008
Posts: 1,159
PA
umungus1122 Offline
umungus1122  Offline

Joined: Feb 2008
Posts: 1,159
PA
Ditch the Lucas products, especially the oil stabilizer. Get a 10w-40 high mileage oil, or 15w-40 HDEO. 15w-40 Maxlife HDEO at Wallymart sounds good for your app. I wouldn't use full synthetic if it's leaking.


'95 Chevy 1/2t 305 208k -NexGen Maxlife 5w-30, Wix filter
'89 Jeep Comanche 4.0 278k - GC 0w-30, Bosch LongLife filter
Re: 1982 Trans am 84K miles Oil recomends ?? [Re: DoubleWasp] #4459819
07/15/17 05:05 AM
07/15/17 05:05 AM
Joined: Sep 2013
Posts: 10,901
Indiana
dlundblad Online happy
dlundblad  Online Happy

Joined: Sep 2013
Posts: 10,901
Indiana
Originally Posted By: DoubleWasp
If your engine has low psi on MS5k with 25% Lucas, then you should run a 20/50. You can't ask for better than Valvoline VR1.


Would there be any issues with running VR1 with the catalytic converter(s)? Not even sure if the car has any.. Early 80's just seems to "new" to me.


03 Jeep WJ 4.0 202k Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 186k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 153k Synpower 5w30 Supertech ST3980 (Ecore)

Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84] #4459822
07/15/17 05:36 AM
07/15/17 05:36 AM
Joined: May 2012
Posts: 6,158
Fort Lauderdale, FL
DoubleWasp Offline
DoubleWasp  Offline

Joined: May 2012
Posts: 6,158
Fort Lauderdale, FL
Lucas oil stabilizer is very thick. If you're getting low psi using 1/4 of that for your fill, you're going to need a thick oil without the stabilizer.

Why oil without the stabilizer? Other than keeping your oil pressure from falling too hard, it is doing nothing for your engine.

I'd at least look at Castrol GTX 20/50.

FordCapri: He's running 1/4 of Lucas stabilizer. He's not going to see more drag with a 20/50. He might even see less.

dlundblad: I've run VR1 in quite a few cat equipped machines without issue.


07 Lincoln Navigator M1 0w-40/FU
68 Charger R/T / Supercharged 440 VR1/DBL7349
07 Ram 3500 4x4 / Cummins 6.7 /DBL7349
17 Maserati GranTurismo Cabrio
Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84] #4459826
07/15/17 05:55 AM
07/15/17 05:55 AM
Joined: Nov 2006
Posts: 21,249
MA, Mittelfranken.de
Trav Offline
Trav  Offline

Joined: Nov 2006
Posts: 21,249
MA, Mittelfranken.de
Whats low oil pressure? I worked on these engine new and we had a lot of new ones apart looking for the cause of low oil pressure right out of the factory before GM came out with some TSB's. Did you take a mechanical reading.
5-7 psi at idle is common even new and 10 psi for every 1K RPM seems to work okay with these engines, some companies had similar issues and went with a dummy gauge for this reason. Swapping out the OE pump for a Mellings unit usually takes car of it if you run it hard.

Edit: On the Z28 there were issues with the dual TBI units and water ingress from the hood, some of these engines that sit had rust on valve stems causing sticking valves, GM had a revised seal and fitting procedure that fixed it. No idea if this is applicable to the TA but after over 30 yrs if it hasn't been an issue I cant see it developing now.
I would use a zinc additive in the oil like the one from Rislone, this engine was not designed for low zinc.

Last edited by Trav; 07/15/17 06:01 AM.

ASE L1, Master. Deutsch Meisterbrief.
Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84] #4459828
07/15/17 06:04 AM
07/15/17 06:04 AM
Joined: Jun 2017
Posts: 395
Western usa
Ammofirst Offline
Ammofirst  Offline

Joined: Jun 2017
Posts: 395
Western usa
Ditto on the Lucas :use something else: stop using ANY TYPE of oil additive. Mobil delvac 1300 would be a good choice. HTHS is 4.3 that's thick. $10.97 gal. at the [censored].

Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84] #4459858
07/15/17 07:05 AM
07/15/17 07:05 AM
Joined: Oct 2015
Posts: 2,931
Balearic Islands , Spain
FordCapriDriver Offline
FordCapriDriver  Offline

Joined: Oct 2015
Posts: 2,931
Balearic Islands , Spain
Absolutely ditch the Lucas stabilizer, and don't use Lucas oil.
I would advise to put new valve stem seals in it.


1975 Ford Capri II Ghia 3000 V6, - Shell Helix HX3 20W-50 w/ 20% Rimula R4X 15W-40 HDEO.
1988 Ford Escort XR3i Cabrio, - Shell Rimula R4X 15W-40, w/ 30% Helix 3 20W-50.


Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84] #4459860
07/15/17 07:07 AM
07/15/17 07:07 AM
Joined: Apr 2005
Posts: 357
CT
CrAlt Offline
CrAlt  Offline

Joined: Apr 2005
Posts: 357
CT
I would run a good HDEO in 15w40 like others said. And skip the lucas stuff or any additives.
WIX filters are good no need to switch to M1 filters.


'16 Wrangler JK PYB 5w20 / MO 349
'77 Corvette JG HR2 10w30 / AC PF454
'83 Trans-Am JG HR2 10w30 / AC PF454
'91 Dodge D150 QSGB 10w40 / AC PF13
Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84] #4459863
07/15/17 07:12 AM
07/15/17 07:12 AM
Joined: May 2005
Posts: 11,002
ROCHESTER, NY
Char Baby Online content
Char Baby  Online Content

Joined: May 2005
Posts: 11,002
ROCHESTER, NY
I have been running strictly 5W30 motor oils(did a little 10W30 in the early 80's) in my '80 FORMULA Firebird V8. Over the past 8-10 yrs, I've been using MaxLife, QS DEFY, Pennzoil HM(all 5W30).


"Retired"
-----------------------------------

'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'15 Nissan Altima 2.5 SV
'15 Honda Civic LX
Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84] #4459984
07/15/17 09:57 AM
07/15/17 09:57 AM
Joined: Jul 2015
Posts: 3,772
MD
AirgunSavant Offline
AirgunSavant  Offline

Joined: Jul 2015
Posts: 3,772
MD
Nice old ride.
I had an 81 TA. Recaro pace car with the 301 Turbo in the day.
About as much hp as my hybrid.. lol
Great looking though.

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