The chart below was compiled from Technical Data Sheets (TDS), read as public flyers, from different brake fluid manufacturers.
No endorsements are implied. All brake fluids brands are not listed. The list is for shelf life comparison (or not) only.
Brands (only) are listed since each brand below listed the same storage info for each DOT type fluid they sell.
Brand | Date Code on Bottle | Unopened Shelf Life |
ACDelco | At least five years. 1) | |
Notes | When stored under appropriate conditions in original closed containers at max temp of 40°C. | |
ATE | Up to 5 years from Born On date in the original sealed container. 2) | |
Bardahl | 2 Years in original container. 3) | |
Belray | XXXXJJJY | 3 Years from Born On date in original sealed container. 4) |
Notes | Example date code printed on bottle (XXXX = internal use, JJJ = Julian date, Y = year). So a lot# of (80482867) was made October 13, 2017 |
|
Castrol | Not specified in TDS 5) | |
Dento | 6) | |
DuPont | 7) | |
Genuine Chemistry (GC) | Not specified in TDS 8) | |
Gulf | Not specified in TDS 9) | |
HD Expert | Up to one year after the date of manufacture in original sealed container. 10) | |
Lucas | Not specified in TDS 11) | |
Mobile | YYYY.MM.DD.D | 3 Years from Born On date in original sealed container. 12) |
MOL | 3 Years from Born On date in original sealed container. 13) | |
Morris | Not specified in TDS 14) | |
Prestone | Not specified in TDS 15) | |
Shell | Not specified in TDS 16) | |
Spec Oil | Not specified in TDS 17) | |
Veedol | Not specified in TDS 18) |
DOT3,4 and 5.1 Brake fluids tend to absorb humidity from the air.
This reduces the boiling point and increases the risk to get to a “vapor lock” phenomena. 19)|
Over time, brake fluid absorbs water from hoses, seals, etc., which also may reduce its boiling point and impair braking performance.
Most brake fluid manufacturers suggest following your vehicle manufacturer's change intervals.
In the absence of vehicle manufacturer specifications, it is generally suggested to change fluid at least every 2 years.
Copper content is the most destructive aspect of brake fluid breakdown.
So even without moisture being present in the fluid, it is still a good idea to change the fluid when it is suppose to be changed. 20)
Year Model | Hydraulic brake fluid Type |
---|---|
1959 to prior to Sept. 1976 production models | DOT 3 21) |
Sept. 1976 to 2006 | DOT 5 (99902-77) 22) 23) |
2007 and later | DOT 4 24) |
Year Model | Check | Change |
---|---|---|
1959-1969 | ||
1970-197825) | Every 2,000 miles | Every 5,000 miles |
1979-198526) | Initial 500, then every 2,500 miles | Every 2 years |
1986-199027) | Check at initial 500 then every 5,000 miles, prior to storage or annually | Change/ Replace as needed |
1991 to 200328) | Every 300 til and including initial 1,000 miles, then every 5,000 miles | Replace as needed |
The following is found in HD Technical Service Bulletin M-712 dated June 16,1977.
When changing from D.O.T. 3 to D.O.T. 5 fluid or when flushing the brake system, it is important that D.O.T. 3 fluid be removed completely.
Old fluid could be contaminated with water and if mixed with the new D.O.T.-5 fluid, it would detract from it's effectiveness.
The old fluid could also cause varnish deposits if the system is operated above the boiling point of D.O.T. 3.
Caution should be used when bleeding because any brake fluid on the pad will contaminate the pad material and reduce brake effectiveness.
The fluid absorbed by the pads cannot be removed satisfactorily with any solvent nor by operating the brakes.
Procedure: