Best oil for 100K + engines?

[Splatmaster527]

I use Fran filters there a ***** to get off since they added grip tape to them the socket gets suck but I learned before taking them off punch a whole in them and let them leak out first!!!

Its not like you need to save it... Get a pair of channel lock pliers and twist it of... 10 second job

 

[Freedom Motorsports]

As long as they do not already leak and do not have issues, running synthetic of any kind is best. The number one thing to consider when choosing which oil to run is how you want to maintain your vehicle and your budget. Paying close attention to the recommended drain/change intervals from the manufacturer of the oil you are considering, stick to their recommended intervals or less. Some companies offer longer service intervals than others. Those that offer the longest service intervals will save folks more money over time if they change their oil according to the recommended intervals.

For example, Amsoil Signature Series 5w-30 has a service interval of 25K miles or one year whichever comes first. Most people don't drive that much, the national average is around 13-15K per year so you would be changing your oil once a year.

No matter what you choose to use, make sure to stick to the recommend intervals or less and you will be just fine.

 

[ktmhans]

So no go on the 10-30 mobil? Thinking it might quiet down the lifters

 

[lawjack]

I've got 250k on my denali and i've been running Rotella 15w-40 in her for awhile now

 

[MeanieNJ]

I've got 250k on my denali and i've been running Rotella 15w-40 in her for awhile now

did u switch to that because u were burning thinner oil?

And to answer the question... Engines are made to run with just oil so unless Im burning oil or for some reason feel I need an additive like Lucas or something I dont do it. I just use whatever name brand is on sale conventional oil. No high mileage or anything because to me its a gimmick. If you keep up with your oil changes your engine will last forever on the cheapest oil you can find. Never have I seen or heard of an old engine failing because someone should have ran "high mileage" oil instead of normal oil. The only thing I would have done had I bought my truck new was switched to full synthetic after the break in period. Too late for that now though.

 

[lawjack]

Naw, I used it because its what my dads boss ran in all his fleet trucks, and he always let me use the extra for free, so it was free, and i figured why not haha

 

[MeanieNJ]

Cant beat free lol. Kinda thick for cold starts but other then that its good stuff.

 

[DefendHawaii]

I've got 250k on my denali and i've been running Rotella 15w-40 in her for awhile now

Is that working well? I just got my Burb and am at 244K and am running some just Mobil 1 regular 10w-40.

I am looking to upgrade and was going to use synthetic but not sure on jumping from one to the other.

 

[Freedom Motorsports]

While it is true, it is hard to beat free, Rotella 15-40 is a diesel oil. It is formulated specifically for diesel engines and will not provide the best protection for a gas engine. It is also harder on the oil pump, etc because it is such a heavier weight viscosity.

 

[01HDtahoeNJN]

Its not like you need to save it... Get a pair of channel lock pliers and twist it of... 10 second job

Yes but it's I don't like making messes if you punch a whole in the filter to control the oil and let it leak out

 

[El Capitan]

Amsoil signature series full synthetic with a wix filter. I'm a preferred customer, so that helps.

+1 for awhile i thought i was the only one who uses amsoil but i use the amsoil filter

 

[purple 'hoe]

If I owned a vehicle that was performance based or that required a synthetic oil then I would run it based on what the manufacture recommends. But since I have a worn out TBI 350 and a 6.0 Vortec, I use regular conventional oil (5w30 in both). Mobil brand though.

I don't see the need for a synthetic in either of my trucks. I pay $15 dollars for oil and a filter. Not a big deal imo to change oil then.

 

[00yukongmc]

valvoline its what my dad always used and he swears by it so thats what i use

 

[eviljester]

I use mobil 1 high milage 5/30 with a puralator pure one filter, changed every 4500 miles and i dont burn any oil between changes

I am also the manager of an oil change shop and you can start running synthetic at any time and can switch back at any time

 

[Freedom Motorsports]

+1 for awhile i thought i was the only one who uses amsoil but i use the amsoil filter

Nope, I was actually using Amsoil for several years before becoming a dealer. A friend owns the local Carquest and he carries it. He convinced me to try it in one of my trucks and although it took me quite sometime before I felt comfortable extending my service intervals, once I did I was fully converted

If I owned a vehicle that was performance based or that required a synthetic oil then I would run it based on what the manufacture recommends. But since I have a worn out TBI 350 and a 6.0 Vortec, I use regular conventional oil (5w30 in both). Mobil brand though.

I don't see the need for a synthetic in either of my trucks. I pay $15 dollars for oil and a filter. Not a big deal imo to change oil then.

Honestly, on an older vehicle that has lived it's life with conventional and is already on the down side of it's effective service life, I agree.

I use mobil 1 high milage 5/30 with a puralator pure one filter, changed every 4500 miles and i dont burn any oil between changes

I am also the manager of an oil change shop and you can start running synthetic at any time and can switch back at any time

This is correct in a sense. As long as it is in good operating condition with no visible leaks already present. But to switch to synthetic and then switch back to conventional being bad is just a myth.

 

[2000yuknoslt]

i use amsoil on mine with 170k

 

[PH99TAHOE]

I have always run Mobil 1 synthetic in all my rides. For those of you who have an Escalade or Denali, pay close attention to the manufacturer guidelines in the owners manual. They recomend 5w30 in all cases. If 5W30 is not availible 10w30 can be used, but is not recomended.

I'm not 100% sure, but I think the 6.0L were built with tighter tolerances, and higher viscosity oils in these cause oil windage on the rotating assembly robbing hp/tq and fuel mileage.

 

[Stimpy]

I use Cerma in mine.


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[Wake]

If I owned a vehicle that was performance based or that required a synthetic oil then I would run it based on what the manufacture recommends. But since I have a worn out TBI 350 and a 6.0 Vortec, I use regular conventional oil (5w30 in both). Mobil brand though.

I don't see the need for a synthetic in either of my trucks. I pay $15 dollars for oil and a filter. Not a big deal imo to change oil then.

I use Mobil 1 synthetic in all my vehciles, I have since the early 90s when I got my first high performance vehicle. I continue to use it even in my econobox, trucks, SUVs, beaters, etc.

What sold me on straight synthetic oil was the first time I tore the top of the engine off on my old IROC-Z. 120K miles and not a single bit of sludge in the heads, lifter valleys, etc. It was perfectly clean inside, only a light brown staining of the aluminum parts.

I've torn apart a few engines and never saw a high mileage clean engine before my synthetic bred Camaro. I've had my share though of sludged up engines running conventional oil though.

Engines run hotter nowadays, synthetic doesn't break down and cook until much higher temperatures and it sure showed in my Camaro and any engine I've been inside running synthetic oil since.

A clean engine is a happy engine.

 

[ljo]

130K miles. German Castrol 0W-30 with Wix filter. Due for an oil change buy the monitor and is still at the full mark on the dipstick.