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| techtalk:ref:wheels03a [2024/05/23 04:34] – created hippysmack | techtalk:ref:wheels03a [2024/05/23 05:48] (current) – [Example of an outdated (new) bottle of brake fluid] hippysmack | ||
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| It was noticed that the color of the new fluid was darker than the old fluid being replaced. \\ | It was noticed that the color of the new fluid was darker than the old fluid being replaced. \\ | ||
| This is what caused question if the new fluid was still good. \\ | This is what caused question if the new fluid was still good. \\ | ||
| - | (however, new fluid should always be darker than the used fluid as it gets lighter | + | (however, new fluid should always be darker than the used fluid as it gets lighter upon use) \\ |
| - | DOT 5 will turn clear to yellow tint with age/use and that is normal. But the excursion was productive. \\ | + | DOT 5 will turn clear to yellow tint with use and that is normal. But the excursion was productive. \\ |
| Looking into an old master cylinder, the darkness in there is not the fluid itself. \\ | Looking into an old master cylinder, the darkness in there is not the fluid itself. \\ | ||
| It's particles in the fluid that have dropped out of suspension floating around or landing on the bottom and/or sides. \\ | It's particles in the fluid that have dropped out of suspension floating around or landing on the bottom and/or sides. \\ | ||
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| The best account of the lot numbers were 131023018 (but the number count was one more than was given by Belray). \\ | The best account of the lot numbers were 131023018 (but the number count was one more than was given by Belray). \\ | ||
| Given the first four numbers are insignificant, | Given the first four numbers are insignificant, | ||
| + | That made the bottle about 3.5 years old at that point. Which makes the newly purchased bottle about 5 months past the "born on" date (or shelf life). \\ | ||
| + | |||
| You can search for __Julian calendars__ on the internet. Find one for the full year so you can see the numbers for the year. \\ | You can search for __Julian calendars__ on the internet. Find one for the full year so you can see the numbers for the year. \\ | ||
| A Julian calendar is shown below for August 2018 for this example. \\ | A Julian calendar is shown below for August 2018 for this example. \\ | ||
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| - | That made the bottle about 3.5 years old at that point. Which makes the newly purchased | + | You can see the color contrast between the 2 fluids. But that's not as easy to tell if you only open the old fluid. \\ |
| + | Either could be perceived as purple. But the newer fluid is the tint that left Belray. \\ | ||
| + | Shelf life is the time from when it was bottled and sealed at the manufacturer to when the seal is broken. \\ | ||
| + | |||
| + | This is the newer bottle | ||
| + | {{: | ||
| + | |||
| + | These pics are of the old (new) bottle. ((photos by RandallM)) \\ | ||
| + | {{: | ||
| + | |||
| + | \\ | ||
| Belray' | Belray' | ||
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| So, doing the math and combining the info above with Belray' | So, doing the math and combining the info above with Belray' | ||
| - | Their DOT 5 fluid with a 2.9 year born on date would still be useable for 1 year. \\ | + | Their DOT 5 fluid with a 2.9 year shelf life would still be useable for 1 year. \\ |
| Other brake fluid manufacturers may suggest replacing their fluids around every 2 years for water based brake fluids. \\ | Other brake fluid manufacturers may suggest replacing their fluids around every 2 years for water based brake fluids. \\ | ||
| Might that be why their published shelf life is only 2 years? We may never know. \\ | Might that be why their published shelf life is only 2 years? We may never know. \\ | ||
