I ran across a bottle of this new Mobil 1 the other day. Had to do a double take at $50 a jug for Mobil 1. On the double take, it claims to be good for 1 year or 20k.
Who is going to try it 1st and who is going to have a relative toast a motor due to not checking oil levels over the coarse of a year?
The fellow who built my last engine did so with a 250,000-mile guarantee, as long as I changed the oil every 25,000 miles with Mobil1.
So 5 quarts, sounds cheap. If I let the dealer change the oil in my BRZ with 6 quarts of Mobil 1 it's approaching $100.
I've been running 10,000 mile intervals with plain jane Mobil1. Blackstone labs says the oil still has life left in it
As always, it depends. What kind of engine, what kind of driving, etc. I remember back in the late 80s, a friend of mine had an 88 Mercury Tracer. He put M1 in it, and every 5k miles or so, he'd change the filter and top it off. I think he did complete changes every 25k or so, and when he pulled the valve cover at 100k, the thing looked like new. And I'm sure today's M1 is much better than what they were selling 30 years ago.
OTOH, that was a relatively simple port-injected normally-aspirated 4-banger. I'd never try something like that with my SHO or Expedition with their direct-injected twin-turbo engines. If nothing else, fuel dilution starts to become an issue, so I stick with 5k intervals. But also, the Expedition does a fair bit of towing, and when a 3.5L V6 is hauling 15k pounds of total weight, it's in the boost ALL the time.
Since this is what I do for a living.... it's possible. I'm able to get 11k mile OCI's on the wife's Rio with Walmart Synthetic. I know some brands of expensive oils get 20k easy. BUT.... that depends on the vehicle. Honda's can't quite run the same long intervals likely because they like to run a little warmer.Newer GDI cars not so much because they tend to have a lot of fuel in them.
The way you find out is to test. Run it, test it and if good keep running it and test again.
I used to run 17k on royal purple. Now i run 10k on good synthetic. I ran 40k on a 305 with cheap dino oil trying to kill it and it never happened.
Patrick wrote: I used to run 17k on royal purple. Now i run 10k on good synthetic. I ran 40k on a 305 with cheap dino oil trying to kill it and it never happened.
What kills oil is fuel in the oil, water in the oil, antifreeze in the oil, (That last one is the worst), and combustion by products. IF your engine is not running rich or has no water leaks into the oil it will keep working. But, it's the additives that break down over time and leave you with just plain old oil and when that happens the oil will start to break down.
Over the road trucks have been going 50K or longer on an oil change for many years. They my even be able to go longer now with the improvements in both Diesel engines and oils.
In reply to jimbbski:
Many OTR trucks also have 15-20 gallon sumps. So you're talking about 10 times the amount of fluid being used. Sump size can make a huge difference.
Bobzilla wrote: The way you find out is to test. Run it, test it and if good keep running it and test again.
This. We have done 25,000 mile oil changes on many vehicles in our family, using Amsoil products. None of the vehicles had any oil related issues. This has saved me quite a bit over the years, as I drive 20-25K a year. Doing 3K oil changes meant I was changing oil every 6 weeks, gets old quickly. If you do run the new Mobil 1 oil, you still have to check your oil level on a regular basis.
In reply to 81cpcamaro:
WHAT? you can't just forget about it for a year? Geesh... what good is it?
Here's my "problem" with the long oil change intervals. ALL engines burn oil. Just because your oil can go 20k miles doesn't mean you won't have to top it off at some point.
And since that 20k-mile oil is usually super expensive, sometimes it ends up being almost as cheap to just change the dang stuff at 5k intervals and use "regular" synthetic oil.
81cpcamaro wrote:Bobzilla wrote: The way you find out is to test. Run it, test it and if good keep running it and test again.This. We have done 25,000 mile oil changes on many vehicles in our family, using Amsoil products. None of the vehicles had any oil related issues. This has saved me quite a bit over the years, as I drive 20-25K a year. Doing 3K oil changes meant I was changing oil every 6 weeks, gets old quickly. If you do run the new Mobil 1 oil, you still have to check your oil level on a regular basis.
Tell me more about your Avon makeup. Sorry, I mean Amsoil products. 
In reply to Sky_Render:
Interestingly enough, the Rio burns 1 qt in 11k miles. The truck burns a half quart in 10k miles. So apparently not ALL engines burn oil. WIth that said, VTEC engines seem to love oil. I remember seeing TSX's that were 4qts low at 5k miles.
In reply to Bobzilla:
The 230k K24 in the wifemobile burns of nearly a QT a week.
In reply to Bobzilla:
So you are saying size DOES matter. How does Ms. Bobzilla feel about that?
I change my oil every 2k miles in my zephyr running 15w40 rotella. Its a bit rich at idle and gets fuel diluted, the 99 silverado gets conventional every 3k and the wifes 04 ion has had castrol synthetic every 5k for 12years/ 130k miles. I dont run anything over 5k miles, i find oil changes cheap insurance.
Bobzilla wrote: Since this is what I do for a living.... it's possible. I'm able to get 11k mile OCI's on the wife's Rio with Walmart Synthetic. I know some brands of expensive oils get 20k easy. BUT.... that depends on the vehicle. Honda's can't quite run the same long intervals likely because they like to run a little warmer.Newer GDI cars not so much because they tend to have a lot of fuel in them. The way you find out is to test. Run it, test it and if good keep running it and test again.
So since you also know Hyundai/Kia products well, am I changing my oil too often? I do 7500 mile intervals. DD is a '13 Elantra 6spd...port injected little whimp of a motor. 30k+ per year driving, 50% highway cruising at 80mph, 25% suburban secondary roads, 25% urban rush hour traffic. Wife's DD is 2010 Sedona...90% suburban secondary roads, the rest a small mix of highway type stuff.
Klayfish wrote:Bobzilla wrote: Since this is what I do for a living.... it's possible. I'm able to get 11k mile OCI's on the wife's Rio with Walmart Synthetic. I know some brands of expensive oils get 20k easy. BUT.... that depends on the vehicle. Honda's can't quite run the same long intervals likely because they like to run a little warmer.Newer GDI cars not so much because they tend to have a lot of fuel in them. The way you find out is to test. Run it, test it and if good keep running it and test again.So since you also know Hyundai/Kia products well, am I changing my oil too often? I do 7500 mile intervals. DD is a '13 Elantra 6spd...port injected little whimp of a motor. 30k+ per year driving, 50% highway cruising at 80mph, 25% suburban secondary roads, 25% urban rush hour traffic. Wife's DD is 2010 Sedona...90% suburban secondary roads, the rest a small mix of highway type stuff.
You can always send it to Blackstone for analysis. They should be able to give you a pretty good idea of how "used up" it is.
there are better places to send it.... ahem..... but yes. I'd run a couple samples and see. I was running 7k on the Forte usually.
Bobzilla wrote: there are better places to send it.... ahem..... but yes. I'd run a couple samples and see. I was running 7k on the Forte usually.
Who would you recomend? Id be interested in having the oil out of my zephyr tested out of curiosity. Blackstone is the only one ive used.
I wonder if it will really go 20k in most cars without the UOA coming out horrible or they're banking on some amount of top off oil keeping things in range. Kinda like an upscale version of the old beater that never needs the pan drained since it burns though the entire sump capacity within a normal oil change interval.
Bobzilla wrote: In reply to jimbbski: Many OTR trucks also have 15-20 gallon sumps. So you're talking about 10 times the amount of fluid being used. Sump size can make a huge difference.
No, the biggest right now are 12 gallons. There are some anamolies like guys with earth mover pans but 10-12 gallons is the norm. The owners manual on the DD13/15 do suggest 50,000 mile oil changes on regular old CJ4 and CK4 has been out 6 months or so and all of the companies are touting it to have 50% better life. This isn't even synthetic! We run oil analysis on site and anyone going those miles are going to be changing the filters, running an analysis and checking the results before closing the hood and going another 10k miles.
Also: OTR usually refers to Off The Road trucks like earth movers and mining trucks.
My Malibu was doing almost all highway mileage and I was going about 15,000 between oil changes on mostly Mobil 1 and occasionally Syntec. After 400,000 I was still only losing a bit over half a quart between changes and I'd bet more of that to some leaks than to burning.
They are just catching up to Amsoil.
I have been doing the one year thing with synthetics since 1994. Amsoil since 2000.
My 2013 Fiesta's owners manual says change oil at 10K miles.
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