rev up your engines, today I'm going to help you answer the
question, do I need to change the coolant in my car, and to answer that question
correctly I'll give you a little history lesson, in my grandfather's day, they
actually used alcohol mixed with the water to keep it from freezing in the
winter, but then when it got above 32 outside, the alcohol would boil off and
then the car would overheat because there wasn't enough cooling inside the
radiator, so then they came out with the first real antifreeze, which was ethylene
glycol based, the classical green stuff but again in my grandfather's day,
they said oh that's a permanent antifreeze you don't have to worry about it
like the alcohol boiling off, so they left it in, well they found out it wasn't
permanent, over time it would corrode and it would destroy the engines, so they had
to change it every three years, because the additives would break down, but that
was called inorganic acid technology IAT,
but the inorganic acid technology has it's downfalls, you still have to change it
every three years, because the additives break down and being inorganic, it
conducts electricity better and there's galvanic response inside that
eventually it'll start eating up parts of the metal of the car, but then in the
90s they started to come out full blast with organic acid technology coolants,
which can last five years one hundred and fifty thousand miles, and some of the
newer ones can last even longer the newer oats or organic acid
technology coolants, they last longer they're less corrosive, they're less
poisonous to animals if you spill some and they drink it, and it's meant to be
changed about every five years or 100,000 miles or so, so if you're the
type of person that only drives their car a hundred thousand miles or less, and
gets rid of it, you don't have to change it at all then, and to finish the
history lesson, there's HOAT coolants which stands their hybrid organic acid
technology, like this pink toyota one these HOAT coolants are the creme de la
creme, they add silicates to protect the aluminum, which the oats don't have, so it
actually is best for modern aluminum based engines, and some of them you can
change them every seven years or 150,000 miles, now the reason these Hoat
coolants can last so long, is that they contain less electrically conductive
materials then the older coolants did, so it leads
to less degradation of the rubber hoses and the metal parts, because it doesn't
conduct the electricity that the other coolants did, now this might sound a bit
crazy to you, but you can actually get a voltmeter, you can measure the voltage in
the coolant in your radiator system, when it gets old and dirty and especially if
it's an inorganic acid coolant, it will conduct electricity that starts to eat
things up and it can even mess with the computer sensors of your car, and that's
why I've gone to this hoat coolant, not only does it last a long time, but it
doesn't conduct electricity all that well, so it doesn't mess with your
electrical system and it doesn't cause any kind of galvanic responses that are going to eat up the aluminum in your engine but of course everything eventually
breaks down, even the hoat coolant, they say you should change it every seven
years or 150,000 miles in a lot of these models, check with your own make
and model just to make sure when you have to change it, but you can go a long
time before you have to change it in a modern car, and the important thing to
remember is, when it is time to change your coolant use the correct coolant, now
the Hoat is the best, so if you want to keep your car lasting longest in any car,
if you flush the whole system out, you can then replace it with Hoat coolant
and you'll have the best protection available, but whatever you do, do not mix
the inorganic acid old green stuff with the organic stuff or mix the organic
stuff with the hybrid organic acid technology, you want to use one type in
your car and like I said, if you flushed the whole thing out, then you can use
whatever one you want, but the hoats are the best, they're going to last the longest,
so do that and I know people are going to say, but Scotty the hoats cost so much money,
they don't cost that much money anymore, they did originally but now
there's many aftermarket companies that make them, and you might pay an extra
three or four dollars a gallon, what's that to the life of a car, and since this is
mechanic Monday's, I'm going to give away a gallon of hoat coolant, if you want to
try to win just place a clean non-offensive comment on youtube
comments below and a computer will randomly pick the winner,
so if you never want to miss another one of my new car repair videos, remember to
ring that Bell!
