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Old 05-04-2019, 15:06   #16
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Join Date: Nov 2008
Location: Deale, MD
Boat: PDQ Altair, 32/34
Posts: 8,388
Re: Coolant brand for 3GM30F

Originally Posted by masonc View Post
Shell Rotella ELC Extended Life Coolant/Anti-Freeze has Been

Proven, With Over 100 Million miles of Fleet Testing, to

Provide Complete Protection of all Cooling System

Components. The Inhibitors in ROTELLA ELC, due to Their

Special Chemistry, are Designed to go 600,000 miles on-

Road or 12,000 Hours off-Road With Only one Shell Rotella

ELC Extender Addition at 300,000 miles or 6,000 Hours.

After 600,000 miles or 12,000 Hours it is Recommended That

the Coolant be Tested for Continued use.

A good product. However, the 1-year recommendation is based on the possibility of salt contamination and has NOTHING to do with the AF type. The same engines in stationary (land) generator or industrial applications enjoy longer change interval recommendations.

Boats are different.
Gear Testing--Engineering--Sailing
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Old 05-04-2019, 20:45   #17
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Re: Coolant brand for 3GM30F

I use Yanmar brand antifreeze, which I get at a Yanmar dealer, and change it every spring.
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3gm, 3gm30, coolant

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