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1995 Chevy 5.0 TBI Oil #4547709
10/18/17 09:54 PM
10/18/17 09:54 PM
Joined: Dec 2009
Posts: 61
Rhode Island
WA1DH Offline OP
WA1DH  Offline OP
Joined: Dec 2009
Posts: 61
Rhode Island
I've been running Quaker State Defy 5W30 in my 95 GMC 1500 with the 5.0 TBI engine. I put about 1000 mi a year on it hauling firewood and kayaks and do a yearly oil change in the fall. This year I noticed I'm having a hard time finding Defy anymore. I remember that being recommended based on the flat tappet design and additive package.

What's a good replacement for the Defy? Note that this engine seems to have leaky valve seals as it will belch and cough a bit with white/gray smoke until it warms up, after which it runs great (only happens on cold starts when it's been sitting a while).

146,000 mi on this beast so far.

Thanks.

Last edited by WA1DH; 10/18/17 09:54 PM.

1995 GMC K1500 5.0 V8 147k mi
1999 Ford Escort 2.0 I4 235k mi
Re: 1995 Chevy 5.0 TBI Oil [Re: WA1DH] #4547714
10/18/17 10:01 PM
10/18/17 10:01 PM
Joined: Jun 2003
Posts: 17,363
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,363
Deplorable in apple valley, ca
I have seen those engines go 400k+ on quick lube oils. Never seen a cam fail on one.


02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: 1995 Chevy 5.0 TBI Oil [Re: WA1DH] #4547730
10/18/17 10:44 PM
10/18/17 10:44 PM
Joined: Apr 2016
Posts: 1,185
Campbellsville, KY
Alex_V Offline
Alex_V  Offline
Joined: Apr 2016
Posts: 1,185
Campbellsville, KY
Maxlife 10w30 all day long.


I like Chevy and Valvoline.

'13 Cruze, 1.4T, 113K
'85 GMC C3500, 454, 130K
'82 Mercedes 300CD, OM617 turbo, 169K
'67 Suburban, 350, 331K
Re: 1995 Chevy 5.0 TBI Oil [Re: WA1DH] #4547734
10/18/17 10:49 PM
10/18/17 10:49 PM
Joined: Feb 2013
Posts: 10,712
Phoenix, AZ
Nick1994 Offline
Nick1994  Offline
Joined: Feb 2013
Posts: 10,712
Phoenix, AZ
MaxLife 5w30


2015 Hyundai Sonata 2.4L 84k Mobil 1 AFE 0w30 & OEM
2000 Toyota Camry 2.2L 230k Valvoline 5w30 & Fram Ultra
1996 Jeep Cherokee 4.0L 147k Mobil 1 HM 10w40 & Fram Ultra
Re: 1995 Chevy 5.0 TBI Oil [Re: WA1DH] #4547736
10/18/17 10:54 PM
10/18/17 10:54 PM
Joined: Sep 2010
Posts: 7,001
Texas
4WD Offline
4WD  Offline
Joined: Sep 2010
Posts: 7,001
Texas
10w30 high mileage is a tad thicker 😣

Re: 1995 Chevy 5.0 TBI Oil [Re: WA1DH] #4547737
10/18/17 10:54 PM
10/18/17 10:54 PM
Joined: Feb 2013
Posts: 10,712
Phoenix, AZ
Nick1994 Offline
Nick1994  Offline
Joined: Feb 2013
Posts: 10,712
Phoenix, AZ
How cold does it get in Rhode Island?


2015 Hyundai Sonata 2.4L 84k Mobil 1 AFE 0w30 & OEM
2000 Toyota Camry 2.2L 230k Valvoline 5w30 & Fram Ultra
1996 Jeep Cherokee 4.0L 147k Mobil 1 HM 10w40 & Fram Ultra
Re: 1995 Chevy 5.0 TBI Oil [Re: WA1DH] #4547826
10/19/17 02:31 AM
10/19/17 02:31 AM
Joined: Feb 2014
Posts: 2,288
Kansan,1911 45ACP fan
Marco620 Offline
Marco620  Offline
Joined: Feb 2014
Posts: 2,288
Kansan,1911 45ACP fan
Run QS Defy with Motor Oil Saver and Mos2 by Liquimoly. Sounds like you need Gumout Regane to clean also. Would run Gumout Multi tune in oil,throttle,brake booster and crankcase to fix issue.


15' Civic 179k.0w20 Redline/Archoil9100,Eibach,Yokohama/Borla Exhaust/Tein Suspension/Fu7317/Redline Si-1
Right to work state proud. Non union household
Re: 1995 Chevy 5.0 TBI Oil [Re: WA1DH] #4547835
10/19/17 03:49 AM
10/19/17 03:49 AM
Joined: Jun 2008
Posts: 267
Minnesota
bmod305 Offline
bmod305  Offline
Joined: Jun 2008
Posts: 267
Minnesota
10W-30 made by anyone...engine will run forever. Those older SBC (87-95) with TBI are bullet proof-great engine. Valve seals and TBI base gaskets are about the only issue. Have some independent shop or "side job" mechanic replace the valve seals. Worked at a GM dealership back in the day and replacing the valve seals was a common fix for the morning first start smoke.

Dave

Re: 1995 Chevy 5.0 TBI Oil [Re: Alex_V] #4547859
10/19/17 05:38 AM
10/19/17 05:38 AM
Joined: Jun 2011
Posts: 1,755
Crawfordville FL
SilverFusion2010 Offline
SilverFusion2010  Offline
Joined: Jun 2011
Posts: 1,755
Crawfordville FL
Originally Posted By: Alex_V
Maxlife 10w30 all day long.


+1


2010 Ford Fusion SE 3.0L V6, 178k miles M1 HM 10w-30
Re: 1995 Chevy 5.0 TBI Oil [Re: WA1DH] #4548121
10/19/17 10:36 AM
10/19/17 10:36 AM
Joined: Apr 2017
Posts: 966
SF BAY AREA, CA
dogememe Offline
dogememe  Offline
Joined: Apr 2017
Posts: 966
SF BAY AREA, CA
Royal purple HPS or HMX 5w-30.

Last edited by dogememe; 10/19/17 10:37 AM.

2007 Crown Vic P71 4.6 ~127K Miles, RP HPS 5W-30, RP 20-820, Daily Driver.
2010 Escape FWD 2.5 ~90K Miles, Castrol Edge EP 5W-30, Wix 51348, Rented on Turo.
Re: 1995 Chevy 5.0 TBI Oil [Re: WA1DH] #4548269
10/19/17 12:36 PM
10/19/17 12:36 PM
Joined: Oct 2015
Posts: 2,660
Balearic Islands , Spain
FordCapriDriver Offline
FordCapriDriver  Offline
Joined: Oct 2015
Posts: 2,660
Balearic Islands , Spain
Shell Rotella 10w-30.


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

1988 Ford Escort Mk4 Xr3i Cabrio, - Shell Rimula R4X 15W-40, w/ 30% Helix 3 20W-50.
Re: 1995 Chevy 5.0 TBI Oil [Re: Nick1994] #4548349
10/19/17 01:56 PM
10/19/17 01:56 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Originally Posted By: Nick1994
MaxLife 5w30


Why not a 10W-30 ?

Are you recommending the new Dexos 1, 2nd Generation 5W-30 ?

Re: 1995 Chevy 5.0 TBI Oil [Re: Merkava_4] #4548580
10/19/17 06:37 PM
10/19/17 06:37 PM
Joined: Feb 2013
Posts: 10,712
Phoenix, AZ
Nick1994 Offline
Nick1994  Offline
Joined: Feb 2013
Posts: 10,712
Phoenix, AZ
Originally Posted By: Merkava_4
Originally Posted By: Nick1994
MaxLife 5w30


Why not a 10W-30 ?

Are you recommending the new Dexos 1, 2nd Generation 5W-30 ?
NorthEast gets kinda cold


2015 Hyundai Sonata 2.4L 84k Mobil 1 AFE 0w30 & OEM
2000 Toyota Camry 2.2L 230k Valvoline 5w30 & Fram Ultra
1996 Jeep Cherokee 4.0L 147k Mobil 1 HM 10w40 & Fram Ultra
Re: 1995 Chevy 5.0 TBI Oil [Re: Nick1994] #4548761
10/19/17 10:45 PM
10/19/17 10:45 PM
Joined: Dec 2009
Posts: 61
Rhode Island
WA1DH Offline OP
WA1DH  Offline OP
Joined: Dec 2009
Posts: 61
Rhode Island
Originally Posted By: Nick1994
Originally Posted By: Merkava_4
Originally Posted By: Nick1994
MaxLife 5w30


Why not a 10W-30 ?

Are you recommending the new Dexos 1, 2nd Generation 5W-30 ?
NorthEast gets kinda cold


We saw -10F one day last winter. Typical coldest here is +10F. Things do crank slow even with 5W30 at -10.

Thanks for the recommendations. I think I will try the Maxlife and send out the current oil for a UOA to see how things look.


1995 GMC K1500 5.0 V8 147k mi
1999 Ford Escort 2.0 I4 235k mi
Re: 1995 Chevy 5.0 TBI Oil [Re: WA1DH] #4548809
10/20/17 12:26 AM
10/20/17 12:26 AM
Joined: Feb 2017
Posts: 1
Canada
Terminative Offline
Terminative  Offline
Joined: Feb 2017
Posts: 1
Canada
I've been using Z-ROD 10w30 for the past 5 years on my '81 305 as a daily driver and it hasn't shown any signs of fatigue so far. For what it's worth I can cold start the car with a carburetor in -40 weather. I want to switch to Redline 0w40 for winter use because it has the right amount of zinc levels and it has the coldest pour point of any oil I've ever seen (-60c) however the cost of the oil is a bit hard to justify.

Last edited by Terminative; 10/20/17 12:41 AM.
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