You can also change the fuels ignition properties by adding something like diesel clean power service. It raises the certane number and is proven to increase fuel economy.
I believe the active chemical that makes the changes are organic peroixdes, these are very unstable chemicals, they don't handle rapid temperature and pressure changes very well.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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