I just searched the backissues and was surprised to find that no one has asked about using the new, high tech 5 year antifreezes in DeLoreans. Does anyone have an opinion on this? A mechanic friend has been very consciencious in reminding me that the DeLorean was designed to have its antifreeze changed every year . . . possibly two years if the car is lightly driven. He cautions me that even in storage the aluminum protective ability of antifreeze disappears in 2-3 years and engine/radiator damage comes swiftly as the coolant's acidity changes. This might partially explain the alarming number of DeLorean radiator failures I have seen discussed here. The new "long life" antifreezes could be a wonderful help to us. Costing only about $1 per gallon more than old fashioned antifreeze, this stuff sounds like a terriffic bargain. As I understand it Prestone's 5 year antifreeze is now standard on new GM cars. After carefully reading the label, I found no mention that this stuff is guaranteed for aluminum engines. They promise "five years of protection for aluminum radiators." Almost every car has an aluminum radiator, and I can get 5 years out of ordinary antifreeze in my iron-engine Chevy. What about my aluminum engine DeLorean? I called Prestone's consumer information line (800)-862-7737 but they only gave me exactly the same information that the label had. I am inclined to believe that the new antifreeze will give my DeLorean five years of worry-free protection, and I am ready to run out and buy some immediately. If any DMLer knows differently please post a caution for all of us! - Mike Substelny (changing antifreeze religiously, still using original radiator after 18 years and 60,000+ miles) ------------------------------------------------------------------------ eGroup home: http://www.eGroups.com/group/dmcnews http://www.eGroups.com - Simplifying group communications