New York City Taxi Demonstration
T WAS A SPECTACULAR FIELD TRIAL. And it was something of a nightmare.
field tests, real-life testing would provide something the laboratory never could.
Welding The Plugs
The AMSOIL test involved sixteen cabs divided into four groups of four cabs each. The
first four were controls. Using the same petroleum oil and filters already in use by the
fleet, they would follow the existing fleet custom of changing oil every 3,000 miles. They
are identified as "Group A".
B" used AMSOIL 10W-40 Synthetic Motor Oil with an AMSOIL Oil Filter. For Group B, the
oil change interval was doubled to 6,000 miles.
same AMSOIL products as "Group B", the third division of cars - "Group
C" - quadrupled the control interval, changing oil at 12,000 miles.
"Group D" ran the ultimate test. Using AMSOIL 10W-40 Synthetic Motor Oil, an
AMSOILS Oil Filter and AMSOIL By-Pass Filter (changing the filter at 12,000-mile
intervals), the taxis were "filled for life". No oil changes at all. In
fact, the drain plugs were welded to the pan.
The life of
the test was 60,000 miles. Overall, the AMSOIL test fleet accumulated nearly ¾ million
Inside The Engines
With the tests completed and the engines removed and disassembled, there was no visible
evidence that an AMSOIL-filled engine without an oil change in 60,000 miles was worse off
than a cab with 20 petroleum oil changes. A systematic analysis of sludge, varnish, rust,
and wear showed little variation between taxis with AMSOIL products and those without,
even though AMSOIL oil change intevals ranged from double to twenty times the
written conclusions, the testing facility responsible for compiling the test data made
data presented in this report indicates that AMSOIL synthetic SAE 10W-40 passenger car
motor oil formulation as desribed here provided protection of test engines from excessive
wear and deposit formation far beyond the normal 3,000-mile change interval."
separate letter to AMSOIL's Technical Director, the testing facility diplomatically
touched on the problems caused by using the Chevrolet engine for testing, while agreeing
with the long-drain conclusions produced by AMSOIL Synthetic Oils:
believe the general conclusion that your 'four times normal drain' engines appeared as
clear as our mineral oil 'normal drain' engines is testimonial to your oil, in spite of
the unanticipated severity of the General Motors 3.8 liter engine."
Adding It Up
In the end, the long, grueling test, so riddled with the unpredictable events of
real-life, pointed to a product vastly better than ordinary petroleum. It established
base-line data that supported AMSOIL recommended drain intervals of 25,000 miles or one
year. It gave visible evidence of how AMSOIL Synthetic Oil behaved in the worst of
circumstances. And it established the role of the company's synthetic lubricants in the
looming age of conservation and environmental awareness.
who used their vehicles to make a living, it promised a way to make the vehicle last
longer, have fewer down hours for general maintenance, and a way to increase the
profitability of their business.
North Dakota Taxi Fleet Recognizes
Savings and Benefits of Their Ten-year Relationship with AMSOIL
With over a
hundred vehicles on the raod, each traveling up to two-hundred fifty miles a day, a taxie
fleet's office manager has his hands full. For Al Wangler, office manager of Schumacher
Cab in Bismark, North Dakota, the responsibility of such a huge operation is
overwehelming, and any product that spares him a few headaches and dollars makes his work
a lot easier.
Cab carries a fleet of taxis, transit vehicles, limousines and crew vans. They've been
using AMSOIL Synthetic Motor Oil, Automatic Transmission Fluid and Synthetic Grease for
over a decade, and they've had outstanding results.
saved thousands of dollars over the years," says Wangler. "But for me, the best
part is the fact that AMSOIL spares us a lot of hassle."
extends the drain intervals of its vehicles to 24,000 miles, so they suffer a lot less
to the time and money saved by the extended drain intervals, Schumacher Cab has realized
the great long-term benefits of maintaining their vehicles with high-quality AMSOIL
lubricants. Wangler feels that the lubricants have helped keep their vehicles on the road
vehicles average about 200,000 miles. We've even had some reach as high as 300,000 miles.
In this business, where the vehicles are used for some very hard, very demanding city
driving, such a long life-span is exceptional. AMSOIL has saved us money by helping us get
more out of our vehicles."
And best of
all, AMSOIL saves Wangler a lot of worry. He knows that the company vehicles have the best
protection available to help them endure their brutal schedules. Fewer maintenance
problems result in less downtime and fewer expenses for him to juggle in the company's
Cab has used AMSOIL products for over ten years, and they plan to continue their
relationship with AMSOIL. It's a relationship that benefits them a great deal. It's a
relationship that will continue to pay a significant role in the success of Schumacher