My 87 is not modified other than injection line heaters. It has run on mixtures from 40-100% WVO depending on the weather. Summers in SC and VA it happily burns 80-100% WVO, balance D2 or kero. As the weather cools the % of D2 goes up accordingly to a max of 60%. Coolest winter temp this year has been low 20'sF. I have been running this setup for over 20K miles, since may of 2006. My oil is VERY clean and has NO water.

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Muleears
'07 E320 Bluetec 133K my DD
'04 Jaguar XJ8 VDP, 34K
'10 Hyundai Accent 60K Grocery Getter
'02 VW Golf soon to be on the road again
'97 E300 Diesel Son's DD
'61 VERY tolerant wife

Hampton Roads, VA USA

Gone but not forgotten:
'67 250S 95K
'86 300SDL
'87 300D Turbo, 364K! R.I.P.
'98 E300 Turbodiesel, 213K
'02 S420, 164K
'01 Prius 138K