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Advice and thoughts on changing to synthetic oil for higher mileage engine? Login/Join 
Member
Picture of GarandGuy
posted
I have a 1999 Chevy 1500 with the 5.3 V8. It's been a great truck no major issues. I've just used regular 5w-30 up to now and thought maybe I should change to synthetic. I'd like to keep this until 200k miles. I've read many conflicting things and thought I'd seek council from the forum think tank.

This message has been edited. Last edited by: GarandGuy,


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Posts: 783 | Location: On the outskirts of Raleigh | Registered: September 10, 2009Reply With QuoteReport This Post
Avoiding
slam fires
Picture of 45 Cal
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I jumped on that hype years back with the 01 jeep.
Damn thing started drinking oil.
I switched back to 5W30 and it stopped.
 
Posts: 21458 | Location: Georgia | Registered: February 19, 2007Reply With QuoteReport This Post
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Picture of craigcpa
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Go with what you know.

If it were new, then, yes, go synthetic.


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Just my 2¢
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Posts: 6846 | Location: Raleighwood | Registered: June 27, 2006Reply With QuoteReport This Post
Almost as Fast as a Speeding Bullet
Picture of Otto Pilot
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I switched to synthetic for my old 4Runner when I was still driving it. It ran quieter and improved the mileage by about 1 mpg (significant enough on that old beasty). I did the 10k 1 year stuff from Amsoil and maybe topped a quart at the 6 month mark.

It was a tight engine though.


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Posts: 11020 | Location: Denver and/or The World | Registered: August 30, 2004Reply With QuoteReport This Post
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Picture of dusty3030
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I'd stick with a good 5w-30 dino oil.

Pennzoil, Valvoline, Quaker State, Mobil Super, Castrol GTX.

One of these will be on sale all the time at one retailer or another.


Straight shootin!
dusty
 
Posts: 3373 | Location: Memphis, mf'n, TN | Registered: August 13, 2005Reply With QuoteReport This Post
Go Vols!
Picture of Oz_Shadow
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I went to a blend. Valvoline Max Life and up a grade.
 
Posts: 14549 | Location: SE Michigan | Registered: February 10, 2007Reply With QuoteReport This Post
Just because you can,
doesn't mean you should
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I would do it.
 
Posts: 4078 | Location: North GA | Registered: August 22, 2002Reply With QuoteReport This Post
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Picture of Ryanp225
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Synthetic is superior by far. Any leaks or consumption that develops are due to the sludge getting rinsed out.


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"You can do it your own way, if it's done just how I say."
 
Posts: 7070 | Location: Colorado | Registered: January 04, 2009Reply With QuoteReport This Post
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Let the mechanics chime in as this is just personal experience.

Since its a 1999 I assume you have 100K+ miles on it. Just stick with regular oil as your motor is well broken in and you will probably use oil like a prior poster stated if you switch.

If you get the motor rebuilt you would be fine to switch.
 
Posts: 1532 | Location: St. Louis, MO | Registered: November 24, 2009Reply With QuoteReport This Post
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Picture of Ryanp225
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quote:
Originally posted by h2oys:
Let the mechanics chime in as this is just personal experience.

Since its a 1999 I assume you have 100K+ miles on it. Just stick with regular oil as your motor is well broken in and you will probably use oil like a prior poster stated if you switch.

If you get the motor rebuilt you would be fine to switch.


That notion is as outdated as VHS. I'd much rather use a bit more oil or have a little leak than keep that sludge build up.


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"You can do it your own way, if it's done just how I say."
 
Posts: 7070 | Location: Colorado | Registered: January 04, 2009Reply With QuoteReport This Post
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posted Hide Post
quote:
Originally posted by Ryanp225:
Synthetic is superior by far. Any leaks or consumption that develops are due to the sludge getting rinsed out.


Not true. Synthetic oil gets past gaskets much easier than traditional oil and causes oil leaks. Sludge does not build up at all with modern Dino oil and it's additives if changed at normal recommended intervals.

OP- I wouldn't do it at this age. There is no reason your truck shouldn't go 200k with Dino oil. The modern additives in oil is much much better than 20 years ago, there is no reason the motor shouldn't do 200k miles on dino oil.
 
Posts: 15858 | Registered: June 12, 2005Reply With QuoteReport This Post
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Picture of Ryanp225
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quote:
Originally posted by jimmy123x:
quote:
Originally posted by Ryanp225:
Synthetic is superior by far. Any leaks or consumption that develops are due to the sludge getting rinsed out.


Not true. Synthetic oil gets past gaskets much easier than traditional oil and causes oil leaks. Sludge does not build up at all with modern Dino oil and it's additives if changed at normal recommended intervals.

OP- I wouldn't do it at this age. There is no reason your truck shouldn't go 200k with Dino oil. The modern additives in oil is much much better than 20 years ago, there is no reason the motor shouldn't do 200k miles on dino oil.

Well hell. I guess being an ASE master tech and having daily experience with this stuff every day for 15 years doesn't match your opinion.


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"You can do it your own way, if it's done just how I say."
 
Posts: 7070 | Location: Colorado | Registered: January 04, 2009Reply With QuoteReport This Post
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Picture of mikeyspizza
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2002 Grand Marquis with 65,000 miles. I can't tighten the oil drain plug tight enough to stop synthetic from dripping through. Went back to dino, no leak.

Synthetic goes in my 2013 & 2014 Sentras, and 2017 VW.
 
Posts: 2511 | Location: North Carolina | Registered: August 16, 2003Reply With QuoteReport This Post
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Picture of erj_pilot
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1997 Toyota Corolla DX - 183,000+ miles. My shop (Christian Brothers) uses a synthetic blend on the Corolla as well as my Venza. Corolla runs great and the shop has made no hint whatsoever that switching to full synthetic would be of any benefit. I might consider a pure synthetic if I continually ran close to or at red line. but since I don't, synthetic is just over-priced hype as far as I'm concerned.

And just remembering that I had a 1986 Mazda RX-7 that had close to 200,000 miles on it when it finally gave up the ghost. I never used a drop of synthetic in the rotary engine as I changed the oil/filter myself on that one and used Pennzoil 10w40 for every mile.



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Posts: 4531 | Location: NW Houston | Registered: April 04, 2012Reply With QuoteReport This Post
Like a party
in your pants
Picture of armored
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I run synthetic in all my cars,(Jeep, Lexus), lawn equipment, and my M11 diesel (4+ Gal) in my RV and in its Kubota 10KW gen. Never a issue.
I especially like it for its winter and cool weather performance were it flows better.
 
Posts: 2960 | Location: Chicago, IL, USA: | Registered: November 17, 2002Reply With QuoteReport This Post
Membership has its privileges
Picture of P-220
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FWIW, my Honda Pilot used 5W-30 for 335,000 miles.

I asked the guys at the shop what they would use if it was their car.

These guys have worked on our cars for the past 2 1/2 decades.

When my 1993 Jeep Cherokee Country developed a squeak that the dealer could not identify, I took it to these guys. When I went to pick it up, the guy handed me a Metallica cassette. I looked at him with a WTF? look. he said "the next time you hear the squeak, just pop this tape in and turn it up, I promise you will not hear the squeak.


Niech Zyje P-220

Steve
 
Posts: 34647 | Location: 45174 | Registered: December 09, 2001Reply With QuoteReport This Post
I Am The Walrus
posted Hide Post
quote:
Originally posted by craigcpa:
Go with what you know.

If it were new, then, yes, go synthetic.


That's my thought.

It got OP that far.


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Edmond
 
Posts: 9230 | Location: Central Florida | Registered: March 12, 2005Reply With QuoteReport This Post
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I switched to synthetic after about 50K miles on my wifes Toyota Corolla because it was loosing one quart of oil somewhere in between oil changes and I thought perhaps the switch would cure that. I never see any oil on the garage floor nor does smoke come out of the tail pipe. The switch accomplished nothing other than making my mechanic a little richer. The color of the oil never changed with either oil in that it never looks dirty and I still lost that quart in between changes. So I'm back to dino oil.
 
Posts: 4666 | Registered: August 18, 2010Reply With QuoteReport This Post
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posted Hide Post
quote:
Originally posted by 45 Cal:
I jumped on that hype years back with the 01 jeep.
Damn thing started drinking oil.
I switched back to 5W30 and it stopped.


^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Same thing happened to me with a Toyota. Switched back to conventional oil and I never need to add oil between changes.


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Posts: 6082 | Registered: January 17, 2011Reply With QuoteReport This Post
Circling the bowl
Picture of Shifferbrains
posted Hide Post
quote:
Originally posted by jimmy123x:
quote:
Originally posted by Ryanp225:
Synthetic is superior by far. Any leaks or consumption that develops are due to the sludge getting rinsed out.


Not true. Synthetic oil gets past gaskets much easier than traditional oil and causes oil leaks. Sludge does not build up at all with modern Dino oil and it's additives if changed at normal recommended intervals.

OP- I wouldn't do it at this age. There is no reason your truck shouldn't go 200k with Dino oil. The modern additives in oil is much much better than 20 years ago, there is no reason the motor shouldn't do 200k miles on dino oil.


Sweet Jesus, would you just stick to driving your boats. Seriously, you don't know shit about what you are trying to pass off as truth.

Synthetic oil does not pass by gaskets easier than dino oil. That's just crap. I have almost 30 years as an auto tech, and what causes oil leaks is the degradation of gaskets over time due to thousands of heat cycles. Lack of proper maintenance will increase the likelihood of leaks.
 
Posts: 4765 | Location: Manteca, CA | Registered: May 30, 2006Reply With QuoteReport This Post
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