At 01:25 AM 3/17/97 -0600, you wrote: >>It is highly possible we have some "newer" >>stuff here in the Houston area as about 99% of all this mess is made >>within shouting distance of the Houston Ship Channel. The coolant I >>investigated was supposed to last 7 years or 70,000 miles with no > >That is clearly different than the "460" Prestone I have here. 4 years, 60K >miles. > >Regards, >Jim Davis > Hi volks... The (orange) Prestone I've switched to is listed as 5/100 (!) - 5 years, 100k miles; states on the container that it is "silicate and phosphate free; add to any antifreeze including DEX-COOL" (which is GM's in-house anti-freeze). As an aside - I've been doing a long term coolant and power steering change as follows; every 3/4 thou I suck the pressure & expansion tanks dry & refill them with new pre-mix (5/100 above - takes almost 1 gal. to fill both tanks). I realize I'll never attain 100% fresh coolant, but you never do anyway with the 'factory' procedure, plus I never have to worry about bleeding/bubbles/accidental overheating (& I'm not concerned ref. flushing as I wouldn't run caustic cleaners in any case). As I wrote I've also been doing the power steering the same way; first time I replaced the filter & O-ring, & I've been using Valvoline semi-synthetic to refill the resevoir. (sucker pumps are @ FLAPs for ~ $5-6). Any comments - ie, am I doing something *really* stoopid; seems to be working so far..... Austin
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