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That's why you pull the DPF, disable or remove the EGR and reprogram the computer to run like an actual diesel engine once the warranty is up or nearly up.
Every one who has deleted this garbage is reporting over 50% higher fuel economy.
If you don't live in or visit a smog problem area then there is no reason to have your vehicle armed with fuel economy murdering extreme NOx eradication equipment.
As far as EGR on gas engines, it usually helps improve fuel economy. But as with most things vehicle related, there are few if any one size fits all, or any one mod that will return the same result on everything.
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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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