Skip to Main Content
Shop by Vehicle
Roll over image to zoom in

AMSOIL Engine and Transmission Flush

Product code : FLSHCNC-EA

Prepares Engines and Transmissions For New Oil

  • Engineered for gasoline and diesel engines and automatic transmissions
  • Helps restore fuel economy, increase operating efficiency and reduce emissions
  • Potent, detergent-based formula cleans sludge and deposit build-up, promoting reduced oil consumption

AMSOIL Engine and Transmission Flush



AMSOIL Engine and Transmission Flush (FLSH) helps restore fuel economy, increase operating efficiency and reduce emissions in gasoline and diesel engines, and automatic transmissions. Its potent, detergent-based formula cleans sludge and deposit build-up, promoting reduced oil consumption. AMSOIL Engine and Transmission Flush is safe on parts and can be easily disposed of with waste oil.

Restores Vehicles to Like-New
New engines and transmissions run more efficiently, but over time they gather harmful deposits that cause power and performance loss. Stop-and-go driving, prolonged idling, short trips that do not allow the engine to reach full operating temperature, towing, the ingestion of air-borne dirt, fuel dilution, water condensation and oxidized oil all can promote sludge build-up in motor oil and transmission fluid. As it settles, sludge clogs narrow oil passages, restricting oil flow to vital parts, especially the upper valve train area.

In transmissions, deposits can form on clutch plates, causing hesitation and erratic shifting. Ultimately clutch glazing can set in, reducing the life of the transmission. Deposits in engines and transmissions can accelerate wear, causing power loss and increased fuel consumption.

  • Prepares engines and transmissions for new oil
  • Removes deposits and sludge for improved efficiency, fuel economy and lower emissions
  • Prolongs equipment life
  • Detergent-based formula is environmentally friendly
  • Compatible with seals and gaskets
  • One-treatment results
  • Easily disposed of with waste oil

AMSOIL Engine and Transmission Flush Benefits
Unlike many flush products, AMSOIL Engine and Transmission Flush features a multi-use formulation that dissolves and disperses sludge, varnish and deposits in both engines and automatic transmissions. Due to its detergent-based formulation, it can be easily disposed of with waste oil, making it more user-friendly. Its advanced formula of light base oil technology, powerful detergents and dispersants provides safe cleaning action. AMSOIL Engine and Transmission Flush is compatible with both petroleum and synthetic oils, preparing poorly maintained equipment for installation of new oil. It represents the first step toward restoring neglected equipment to top-notch performance. AMSOIL Engine and Transmission Flush provides the following benefits in only one treatment:

Gasoline and Diesel Engines

  • Helps loosen sticky valves and rings, minimizing blow-by and reducing emissions
  • Helps quiet lifter noise
  • Promotes lower operating temperatures through sludge removal
  • Easy disposal

Automatic Transmissions

  • Cleans deposits in oil cooler and ports
  • Helps unclog fluid passages
  • Cleans deposits and varnish from clutch plates, helping improve efficiency
  • Promotes smoother operation and transmission life through reduced shift delay

Applications
AMSOIL Engine and Transmission Flush is recommended for diesel and gasoline engines, and automatic transmissions. Do not use it in differentials.

Directions for Use
Though it works in one treatment, AMSOIL Engine and Transmission Flush is safe enough to be used at every oil change. If using a flushing machine, follow the manufacturer's recommendation. Otherwise, use the following guidelines:

Engine: Add entire bottle of AMSOIL Engine and Transmission Flush to engine oil fill port. Idle the engine for 10-15 minutes, then immediately drain the oil. Ensure enough time for the system to completely
drain. Remove and replace the engine oil filter. Refill engine with new engine oil in the viscosity grade recommended by the manufacturer.

Transmission: Engage emergency brake. Add entire bottle of AMSOIL Engine and Transmission Flush to transmission oil fill port. Idle for 10-15 minutes; shift through drive and reverse. Do NOT place vehicle under heavy load. Drain entire transmission and torque converter of fluid. FILTER MUST BE CHANGED prior to refilling with new transmission fluid.

NOTE: It is not recommended to flush transmissions that do not have a removable pan or access to the transmission filter.

Automatic transmission clutch plates pre-cleanup.
(above) Automatic transmission clutch plates pre-cleanup. Varnish and glazing is heavy on some of the plates.
Automatic transmission clutch plates after cleanup.
(above) Automatic transmission clutch plates after cleanup with AMSOIL Engine and Transmission Flush reveal lighter glazing and varnish.
Cylinder head pre-cleanup.
(above) Cylinder head pre-cleanup. Note the sludge deposits on and around the valve springs and push rod openings.
Cylinder head after cleanup with AMSOIL Engine and Transmission Flush.
(above) Cylinder head after cleanup with AMSOIL Engine and Transmission Flush. The valve springs and push rod openings are noticeably cleaner, with fewer sludge deposits. The manufacturer's stamping is more easily seen.

AMSOIL Engine and Transmission Flush

Data Bulletin

Warranty

SDS



AMSOIL Engine and Transmission Flush

  • 5 star rating
    engine and transmission flush
    By  CATHY,  a  Verified Buyer  from  granada hills california  on  May 20, 2024
    All Amsoil products are high quality and make a true good difference in the performance of our vehicles.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Do it again!!
    By  THOMAS,  a  Verified Buyer  from  Wisconsin Rapids  on  May 18, 2024
    I have used this product numerous times and it does the job. Really cleans the engine with very little effort. I use this on every third oil change.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Great To Flush Out Deposits
    By  FRITZ,  a  Verified Buyer  on  May 14, 2024
    Used for an engine oil change. Followed the directions and drained after pouring into the oil and running the motor. Oil was way darker than normal when I drained it. Scoped oil pan and it was way cleaner than before.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Just Works
    By  MIGUEL,  a  Verified Buyer  from  FL  on  April 28, 2024
    I have used it 4 times in 4 different vehicles, I did noticed the oil coming out way darker than it was before using. does it work, Maybe but it certainly helps to break down sludge.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Love it
    By  MARLON,  a  Verified Buyer  on  April 27, 2024
    It’ works wonders
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Engine/ Transmission flush
    By  WILL,  a  Verified Buyer  on  April 20, 2024
    This is the best additive on the market. I have heard about other products, but none have come close to compare with Amsoil. Not to mention the oil. I highly recommend this product to anyone, anywhere. Will continue to use all of Amsoil products bc it’s 100% Synthetic
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Does work
    By  Larry,  a  Verified Buyer  from  Chicago  on  April 20, 2024
    Good product!!!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    GREAT PRE OIL ROUTINE
    By  EDWARD,  a  Verified Buyer  on  April 15, 2024
    Used this before my first Amsoil filter and oil change, followed the directions. Wow, the oil was darker when I drained it. I will definitely use this before ever oil change. After I added it and was idling for 15 minutes, I noticed the engine smoothed out a bit and started getting a little quieter
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Outstanding!
    By  PAUL,  a  Verified Buyer  from  West Virginia  on  March 14, 2024
    I had a 2014 Impala with 240,000 miles that was starting to use a lot of oil. I added this to the next oil change, ran it and did the change and I still used a little oil. I did it again at my next 10,000 mile change and I have not used any oil between changes since.I now have 270,000 miles. it did a great job of cleaning out the motor.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Very Clean Flush...
    By  GEORGE,  a  Verified Buyer  from  Marxist Empire of Southern California  on  March 05, 2024
    The Oil Wasn't that dirty before the change -- but looks like brand new inside after.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?