Oil Change Intervals Extended [Archive] - GrandAmGT.com Forum


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Mike Jung
06-25-2006, 04:34 PM
Who does extended oil changes ?
Using what oil & oil filter ?
How do you decide when to change the oil & oil filter ?

I am toying with the idea of running longer oil change intervals of 12-months on my GA & my Mom's Sunfire GT.

As I am not putting on the miles/hours on the engine as much any more.
& it feels like a waste to be changing my oil every 6-months.

My last 5-months: I've only put on 3842km / 2387miles.
My Mom's car puts on even less.

I figure that I only put on minimum every 12-months: 8900km/5500miles or about 260-hours of engine running time.

I've read that Police forces' use about a 200-hour engine run time (because of all the idling) oil change interval on dino oil.

The oil & oil filter I plan on using is:
Castrol Syntec 0W-30 synthetic motor oil from Germany & NAPA Gold oil filter.

The oil is rated/spec'd for up to (with OLM in their vehicles) or once a year:
30K km/ 18..6K miles on Mercedes, & Porsche's (before they changed to requiring a xW-40-viscosity oil)
20K km / 12.4K miles on BMW
15K km / 9K miles on Audi

& if the Change Oil light came on (or 12.5K km/ 7.8k miles) before the 12-months: I would have the oil & oil filter changed.

& no I am not planing to do a Used Oil Analysis lab test services.

What do people think ?
Am I crazy ?

06-25-2006, 11:31 PM
Considering that you're more concerned with a time based OCI I'd say that you'll be fine with that oil on 12 months. The only thing I'd do for peace of mind is get the vehicle to operating temp for the oil and maintain that for a good 5 - 10 minutes to evaporate fuel and water contamination once a month.

Right now I'm running brown GC in my '98 Monte w/ 3100 on PF 52s and the '06 Cobalt 2.2 Ecotec with the Delco drop-in. I'll change the oil in the Cobalt every 8 - 10k or when the OLM hits 0 due to dusty conditions. In the Monte I'm not so sure as this is the first time I've run it on GC. It likes it well enough but I might do a short change for the first and extend it up to 8k as well.

No Juju or oil analysis to it.. I just look at the color... When that starts to irk me I change the oil.

06-26-2006, 08:34 AM
Amsoil 5w-30 (not the xl7500 series) 100% synthetic and an amsoil SDF23 or the new Eao23 oil filter. The SDF filter is rated for 12,500 miles and the Eao is rated for 25,000 miles, as is the oil, 25,000 miles or one year. The filter is also the longer filter for more filtration. IMO, if you change your oil by the oil change light, you will change your oil more often than is needed.

JHawk GT
06-26-2006, 12:04 PM
Iíd say go for it Mike. GC should be able easily handle that OCI. Iíve been doing extended OCIs for 2 years with Redline 5W30, UPF-52 filter, and the appropriate dose of LC.

I either change once a year or when the OLM lights up, although I havenít had that happen yet. UOAs are what got me to change my mind about extending my oci. Even though the oil comes out looking black as coal, it usually has a TBN of between 3-4, so I could extend it even farther if I wanted. I havenít put on more than 5k miles a year.

Iíd probably stay with a true synthetic especially if youíre doing mostly city driving like me. Itís much more robust to the effects of fuel or water dilution. Even with my driving habits, fuel is always <0.5% and insolubles have ranged from trace to 0.4%.

I do UOAs mostly because I donít want to wait to see visible evidence of the LIM gasket leak or other problems. As far as Iím concerned, if you see visible evidence, too much damage has already been done.

06-26-2006, 05:26 PM
I've heard mixed reviews about oil changes but I know that my father believes that people change oil far too much. He drives a GMC Yukon and racks up the kilometers really quickly, he uses Castrol 5w-30 in the truck and changes his oil every 10,000kms. Personally, I like to change mine every 5000kms but he hasn't had a problem. I wouldn't worry about extending your changes to 12 months, not one bit.

Mike Jung
07-05-2008, 01:12 AM
Check this out for all you 3K miles / 3-month oil changers...

GM, California to Bust ‘3,000 Mile Myth’ (http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1185467)

Wednesday, June 11, 2008 VOLUME 8 ISSUE 24
Reprinted with permission. ©2008 LNG Publishing Co., Inc

By Nancy DeMarco

General Motors yesterday joined the California Environmental
Protection Agency and its Integrated Waste Management
Board in the state’s “3,000 Mile Myth” campaign to educate
drivers on reducing motor oil consumption by following their
automakers’ recommended oil drain intervals.

In response to research showing that 73 percent of
California drivers change their oil more frequently than
their vehicle manufacturers recommend, the Board has
launched a new public information program to educate
drivers to follow automaker guidelines for oil change frequency.
The program, said the Board, is “designed to
bust the 3,000-mile myth, the old mantra that drivers
should change their oil every 3,000 miles.”
Unnecessary oil changes, the Board said, generate millions
of gallons of waste oil per year and have the potential
to pollute the state’s natural resources.
GM said yesterday that it will support the Board’s program
to help motorists understand how frequently they
need to change their engine oil and the proper methods
of doing so. “The traditional 3,000-mile oil change recommendation
was based on engine and oil technologies of
the past,” GM said.
“General Motors and the California Integrated Waste
Management Board share the common goal of reducing
the amount of both new and used oil in order to help protect
the environment,” said Peter Lord, executive director
of GM Service Operations.
“In California alone, more than 2.5 million GM vehicles are
equipped with the GM Oil Life System,” said Ron
Strayhorn, regional service manager, GM’s Western
Region. “Owners of these vehicles can reduce the amount
of oil they consume simply by following their GM Oil Life
System, which for many drivers can be thousands of miles
between changes as opposed to the old standard.”
These 2.5 million vehicles will save 8 million gallons of oil
a year if their drivers follow the Oil Life System rather than
following a 3,000-mile oil change interval, according to
GM. With the Oil Life System, a computer-based software
algorithm, vehicles typically need oil changes every 5,000
to 7,000 or even 10,000 miles, depending on operating
Nationally, there are 31 million GM vehicles with the Oil
Life System, GM spokesman Tom Henderson told Lube
Report. Following the System rather than a 3,000-mile
drain interval could save 100 million gallons of oil annually.
Auto manufacturers today are calling for 5,000-mile to
15,000-mile drain intervals, Jon Myers, communications
director for the Board, told Lube Report, “but quick lubes
are still saying 3,000 miles, so we need to educate drivers.”
Radio public service announcements are running in
California now, Myers said, to convey the message that
drivers need to check their auto manufacturers’ recommendations.
The Board has also set up a web site,
http://www.3000milemyth.org, with consumer information to
support the campaign.
The campaign urges motorists to check and follow their
vehicle manufacturers’ guidelines for oil changes, and
also to consider using synthetic oils that will allow longer
drain intervals.
Estimating that each driver in California drives about
15,000 miles per year, the Board noted that changing oil
at 5,000 miles instead of 3,000 miles will reduce the
amount of used oil generated by seven or eight quarts,
keeping the oil from entering the waste stream and saving
the driver about $76 per year.
“When it comes to oil changes, less is more,” said the
Board. “You’ll have more money in your wallet by changing
your oil less, and fewer oil changes mean less oil that
needs to be safely managed and recycled.”
The Board, part of the California EPA, is based in
Sacramento, Calif.

My current oil change interval is at:
6-months & about 6.3K km / 3.9K miles

I wonder, how much longer it will go before the CHANGE OIL light will come on ?
Can I make it to the Antoich, IL meet in Aug & back ? lol

PS: GM Canada now recommends oil change intervals of: every 6-months or if the change oil light comes on (or the maximum mileage limit) now.

Mike Jung
07-05-2008, 01:20 AM
PSS: My last oil change see...

When has the CHANGE OIL light come on for you (http://www.grandamgt.com/forum/showthread.php?t=72502)

It came on at 7,689 km / 4,777-miles at 7-months old.

07-05-2008, 01:50 AM
Interesting, my last 2 oil changes I put on over 5800km and no oil change light.