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#4459775 - 07/15/17 12:13 AM 1982 Trans am 84K miles Oil recomends ??
GMguy84 Offline


Registered: 07/14/17
Posts: 250
Loc: 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 DELO 400 XLE 10W30/FUG XG3675

01 Suburban 5.3 Mobil 1 HM 10W40/M1206A

1982 TRANS AM (KITT) Mobil Super 5K HM 10W40/M1302A

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#4459778 - 07/15/17 12:40 AM Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84]
CT8 Offline


Registered: 10/09/14
Posts: 11018
Loc: Idaho
15W-40 would work well.The M1 filter is not needed,
_________________________
"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf

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#4459784 - 07/15/17 01:01 AM Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84]
FordCapriDriver Offline


Registered: 10/22/15
Posts: 2387
Loc: 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, - Valvoline VR1 20W-50
1988 Ford Escort MkIV 1.6 Xr3i Cabrio, - Shell Rimula R4X 15W-40 HDEO.

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#4459790 - 07/15/17 02:01 AM Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84]
DoubleWasp Offline


Registered: 05/21/12
Posts: 5236
Loc: 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

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#4459795 - 07/15/17 03:13 AM Re: 1982 Trans am 84K miles Oil recomends ?? [Re: DoubleWasp]
GMguy84 Offline


Registered: 07/14/17
Posts: 250
Loc: 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





Edited by GMguy84 (07/15/17 03:19 AM)
_________________________
05 Silverado Z71 5.3 DELO 400 XLE 10W30/FUG XG3675

01 Suburban 5.3 Mobil 1 HM 10W40/M1206A

1982 TRANS AM (KITT) Mobil Super 5K HM 10W40/M1302A

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#4459803 - 07/15/17 03:46 AM Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84]
FordCapriDriver Offline


Registered: 10/22/15
Posts: 2387
Loc: 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, - Valvoline VR1 20W-50
1988 Ford Escort MkIV 1.6 Xr3i Cabrio, - Shell Rimula R4X 15W-40 HDEO.

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#4459810 - 07/15/17 04:41 AM Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84]
umungus1122 Offline


Registered: 02/12/08
Posts: 1063
Loc: 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 205k -DuraBlend 5w-20, Puro Gold filter
'89 Jeep Comanche 4.0 278k - GC 0w-30, Bosch LongLife filter

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#4459819 - 07/15/17 05:05 AM Re: 1982 Trans am 84K miles Oil recomends ?? [Re: DoubleWasp]
dlundblad Offline


Registered: 09/30/13
Posts: 10058
Loc: 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 199k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 145k Rotella T5 10w30 Fram TG3980


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#4459822 - 07/15/17 05:36 AM Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84]
DoubleWasp Offline


Registered: 05/21/12
Posts: 5236
Loc: 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

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#4459826 - 07/15/17 05:55 AM Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84]
Trav Offline


Registered: 11/20/06
Posts: 18909
Loc: 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.


Edited by Trav (07/15/17 06:01 AM)
_________________________
ASE L1, Master. Deutsch Meisterbrief.

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#4459828 - 07/15/17 06:04 AM Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84]
Ammofirst Offline


Registered: 06/22/17
Posts: 353
Loc: 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].

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#4459858 - 07/15/17 07:05 AM Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84]
FordCapriDriver Offline


Registered: 10/22/15
Posts: 2387
Loc: 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, - Valvoline VR1 20W-50
1988 Ford Escort MkIV 1.6 Xr3i Cabrio, - Shell Rimula R4X 15W-40 HDEO.

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#4459860 - 07/15/17 07:07 AM Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84]
CrAlt Offline


Registered: 04/03/05
Posts: 346
Loc: 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

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#4459863 - 07/15/17 07:12 AM Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84]
Char Baby Offline


Registered: 05/25/05
Posts: 10028
Loc: 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"
'06 Mazda 3i 2.0L
'15 Nissan Altima 2.5 SV

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#4459984 - 07/15/17 09:57 AM Re: 1982 Trans am 84K miles Oil recomends ?? [Re: GMguy84]
AirgunSavant Offline


Registered: 07/22/15
Posts: 3772
Loc: 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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