Rotella ELC coolant in Mercruiser?

[skunkedskippy]

I don't have a local source for Mercury/Quicksilver coolant, and I don't like paying the high shipping costs (I'm a cheapskate). West Marine has Shell Rotella ELC concentrate for $35 a gallon. With a 15% off sale and after diluting, it's about $15 a gallon.

My service manual says to use an "extended life" or "ethylene glycol" coolant. Seems to me that Rotella should be fine. Anyone have first hand experience?

Carb'd 5.7 with heat exchanger.

 

[tpenfield]

What about Walmart or automotive stores? The West Marine price seems a bit steep. Lots of brands of EG coolant that should be fine.

I've used all sorts of EG coolant in my Mercruiser 7.4 engines.

 

[ROY WILLIAMS]

I don't have a local source for Mercury/Quicksilver coolant, and I don't like paying the high shipping costs (I'm a cheapskate). West Marine has Shell Rotella ELC concentrate for $35 a gallon. With a 15% off sale and after diluting, it's about $15 a gallon.

My service manual says to use an "extended life" or "ethylene glycol" coolant. Seems to me that Rotella should be fine. Anyone have first hand experience?

Carb'd 5.7 with heat exchanger.

I was the 470 engine of that heat exchanger . I did the anti freeze coolant 60% and the distilled water 40% ...6 yrs ago that antifreeze is great ..