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Getting my Chevy 4.3 to 300k #5356583 02/21/20 03:16 PM
Joined: Feb 2020
Posts: 5
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CharlotteB Offline OP
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Hey y'all, I have a 2001 Chevy S10 with the 4.3 V6 that just hit 200k miles. I love this truck. And it's a manual! My goal is to reach 300k miles without any major repairs, and I'd like advice on engine oil.

A bit of background- I do keep on top of maintenance, but I also use it like a truck. I haul around welders and riding mowers, drive on dirt roads, and occasionally I end up towing over 6,000 pounds.

What I've been using is Valvoline Maxlife 10W30 semi-synthetic with a WIX filter, changed every 5,000-6,000 miles. I don't know if I should stick with this or try something fancier. What are good options? I'm just trying to do the best for my engine, so all input is appreciated.

Some of the options I considered-
Sticking with 10W30 Maxlife
Pennzoil Ultra Platinum 10W30
Schaeffers SynShield 10W30 or 15W40 diesel oil
Rotella T5 10W30 or 15W40 diesel oil

Is thicker oil a bad idea? Is diesel oil a good thing in a 4.3? Should I be leery of stretching my OCI? As a side note, I do have a few small leaks and a tiny bit a of blow-by, which the Maxlife helps with. If I go with a non high-mileage oil and it starts to leak more I'll add some STP stop-leak to it, which has worked great for me in the past.

Re: Getting my Chevy 4.3 to 300k [Re: CharlotteB] #5356585 02/21/20 03:22 PM
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PontiacHO Offline
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If you’ve accrued 200k then you are doing everything right. 4.3 V6 is a tough engine but watch for intake leaking coolant into the engine. If you start to see milky residue around the oil cap it’s too late. Main brgs don’t like coolant in the oil. You might want to pull the intake and replace the gaskets as a precaution. Carry on.

Re: Getting my Chevy 4.3 to 300k [Re: CharlotteB] #5356588 02/21/20 03:30 PM
Joined: Mar 2007
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hemitom Offline
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I see no reason to deviate from your current path.


2009 Saturn Vue.
2015 Mustang GT Convertible.
Re: Getting my Chevy 4.3 to 300k [Re: CharlotteB] #5356596 02/21/20 03:42 PM
Joined: Aug 2019
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tundraotto Offline
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If it ain't broke - don't start 'fixing' it.....

Re: Getting my Chevy 4.3 to 300k [Re: CharlotteB] #5356598 02/21/20 03:47 PM
Joined: May 2005
Posts: 12,347
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Char Baby Online Content
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It'll run forever as long as you keep with your current or better maintenance schedule and just fix what breaks.
If you keep fixen'er, she'll keep runnin'!

Best-a-luck,

CB


Retired 6 yrs now & lovin' it
-----------------------------------

'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'15 Nissan Altima 2.5 SV
'15 Honda Civic 1.8 LX
Re: Getting my Chevy 4.3 to 300k [Re: CharlotteB] #5356639 02/21/20 04:46 PM
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CharlotteB Offline OP
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Thanks for the quick replies!

I do change the coolant more frequently than called for. Don't want to risk anything with it. I recently changed the clutch fluid, brake fluid, PS fluid, and MTF too.

Is 5,000 miles a good OCI for Maxlife in my application? It sounds like Maxlife meets with approval around here.

Re: Getting my Chevy 4.3 to 300k [Re: CharlotteB] #5356644 02/21/20 04:54 PM
Joined: Mar 2015
Posts: 7,724
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bbhero Offline
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Yeah Maxlife is good to go....

I'm at 298,500 miles.. .. And my car runs very good still.... I'd drive it on a long trip even now.


Nissan Altima 3.5 Coupe
Cam2 Full synthetic 5w30 Carquest Blue 84356
"Treat your family like your friends and treat your friends like your family."
Re: Getting my Chevy 4.3 to 300k [Re: CharlotteB] #5356652 02/21/20 05:13 PM
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dlundblad Offline
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Have you had to do the lower intake manifold gaskets yet? Aside from that and the transfer case vacuum switch allowing fluid to get sucked from the t case and into the intake, my blazer has been a good little truck. Bought it with 124k 3 years ago and it just passed 170k today. I’ve also dressed it up with BFG K02 tires and Bilstein shocks. It’s more like a pig with lipstick. Lol.

I’ve been giving my truck just about anything I get cheap. I did have a nasty oil leak from the pan, but I was able to slow it down with some Bars stop leak. I plan on continuing using the stuff for the time being.


03 Jeep WJ 4.0 208k
02 Volvo S60 2.4T 199k
97 Chevy Blazer 4.3 175k
04 Audi A4 3.0 210k

Re: Getting my Chevy 4.3 to 300k [Re: CharlotteB] #5356662 02/21/20 05:29 PM
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CharlotteB Offline OP
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I haven't touched the manifold gaskets. Mine's 2wd so no transfer case. How do you like those Bistein shocks? I've been considering some myself.

I'm not exactly sure where my leaks are coming from, but the Maxlife keeps it down to about three or four drips a week. I'm afraid to pressure wash it and see because of electronics. Last time I washed off the engine compartment with just a garden hose, the starter wouldn't work until I hit it with a hammer laugh

Re: Getting my Chevy 4.3 to 300k [Re: CharlotteB] #5356665 02/21/20 05:35 PM
Joined: Jun 2002
Posts: 21,008
MolaKule Offline
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Originally Posted by CharlotteB
Hey y'all, I have a 2001 Chevy S10 with the 4.3 V6 that just hit 200k miles. I love this truck. And it's a manual! My goal is to reach 300k miles without any major repairs, and I'd like advice on engine oil.

A bit of background- I do keep on top of maintenance, but I also use it like a truck. I haul around welders and riding mowers, drive on dirt roads, and occasionally I end up towing over 6,000 pounds.

What I've been using is Valvoline Maxlife 10W30 semi-synthetic with a WIX filter, changed every 5,000-6,000 miles. I don't know if I should stick with this or try something fancier. What are good options? I'm just trying to do the best for my engine, so all input is appreciated.

Some of the options I considered-
Sticking with 10W30 Maxlife
Pennzoil Ultra Platinum 10W30
Schaeffers SynShield 10W30 or 15W40 diesel oil
Rotella T5 10W30 or 15W40 diesel oil

Is thicker oil a bad idea? Is diesel oil a good thing in a 4.3? Should I be leery of stretching my OCI? As a side note, I do have a few small leaks and a tiny bit a of blow-by, which the Maxlife helps with. If I go with a non high-mileage oil and it starts to leak more I'll add some STP stop-leak to it, which has worked great for me in the past.


I have a little over 210,00 miles on 1999 S-10 with the same V6 and use synthetic 10W30 and a PF 52E filter with no oil consumption whatsover. The transmission is automatic and still shifting great.

Last edited by MolaKule; 02/21/20 05:37 PM.

Dr. Larry Fleinhardt: "You know, that term "dark matter" has always perplexed me. It fallaciously implies that the 95% of our universe that cannot be observed is some amorphous, eventless emptiness."
Amita Ramanujan: "I'm sorry?"
Dr. Larry Fleinhardt: "I guess it's all too human. Instead of admitting to the present limits of our knowledge, we just declare things to be unknowable." NUMB3RS
Re: Getting my Chevy 4.3 to 300k [Re: CharlotteB] #5356682 02/21/20 06:11 PM
Joined: Jun 2003
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Chris142 Offline
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We had a shop truck that was a 96 Blazer. Sold it with 280K on it. The engine ran fine. The rest of the truck was falling apart. When ATF started filling up the ash tray we didn't want to deal with it any more. I saw it in the scrap yard a couple years later. It was wrecked and had 313K on it. It got the cheapest 10w30 or 10w40 oil that was on sale and changed every 5-6k.


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: Getting my Chevy 4.3 to 300k [Re: CharlotteB] #5356684 02/21/20 06:11 PM
Joined: Mar 2004
Posts: 24,043
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Donald Offline
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Originally Posted by CharlotteB
Hey y'all, I have a 2001 Chevy S10 with the 4.3 V6 that just hit 200k miles. I love this truck. And it's a manual! My goal is to reach 300k miles without any major repairs, and I'd like advice on engine oil.

A bit of background- I do keep on top of maintenance, but I also use it like a truck. I haul around welders and riding mowers, drive on dirt roads, and occasionally I end up towing over 6,000 pounds.

What I've been using is Valvoline Maxlife 10W30 semi-synthetic with a WIX filter, changed every 5,000-6,000 miles. I don't know if I should stick with this or try something fancier. What are good options? I'm just trying to do the best for my engine, so all input is appreciated.

Some of the options I considered-
Sticking with 10W30 Maxlife
Pennzoil Ultra Platinum 10W30
Schaeffers SynShield 10W30 or 15W40 diesel oil
Rotella T5 10W30 or 15W40 diesel oil

Is thicker oil a bad idea? Is diesel oil a good thing in a 4.3? Should I be leery of stretching my OCI? As a side note, I do have a few small leaks and a tiny bit a of blow-by, which the Maxlife helps with. If I go with a non high-mileage oil and it starts to leak more I'll add some STP stop-leak to it, which has worked great for me in the past.


You could tow it the last 100K to get it to 300K


2015 Ford F-250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Getting my Chevy 4.3 to 300k [Re: CharlotteB] #5356692 02/21/20 06:25 PM
Joined: Mar 2015
Posts: 7,724
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bbhero Offline
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Originally Posted by CharlotteB
I haven't touched the manifold gaskets. Mine's 2wd so no transfer case. How do you like those Bistein shocks? I've been considering some myself.

I'm not exactly sure where my leaks are coming from, but the Maxlife keeps it down to about three or four drips a week. I'm afraid to pressure wash it and see because of electronics. Last time I washed off the engine compartment with just a garden hose, the starter wouldn't work until I hit it with a hammer laugh



Yeahhhh.... I would not wash a engine bay. Use a degreaser and paper towels or clothes and wipe down.


Nissan Altima 3.5 Coupe
Cam2 Full synthetic 5w30 Carquest Blue 84356
"Treat your family like your friends and treat your friends like your family."
Re: Getting my Chevy 4.3 to 300k [Re: CharlotteB] #5356710 02/21/20 06:51 PM
Joined: Mar 2014
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Leo99 Offline
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I don't think the brand of oil will make any difference. Keep up the maintenance and perform periodic inspections looking for problems. Finding and addressing a small problem prevents a big problem.


Without data you're just another person with an opinion. W. E. Deming

2003 Corolla 250,000 miles (RIP)
2004 Corolla 125,000 miles
2004 Rav4 392,000 miles
2015 Camry 90,000 miles
Re: Getting my Chevy 4.3 to 300k [Re: CharlotteB] #5356711 02/21/20 06:54 PM
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dblshock Offline
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I run TCW-3 640:1 fuel 24/7/365 in my old Toyotas


05 Lexus GX470 175k
640:1 TCW-3
M1 0W40 XG-3614
Toyo Open Country H/T II

06 4Runner SR5 155k
640:1 TCW-3
M1 0W40 XG-3614
Falken Wildpeak AT3W
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