View Single Post
Old 02-20-2015, 04:16 PM
tjts1 tjts1 is offline
Registered User
Join Date: May 2009
Location: The slums of Beverly Hills
Posts: 8,065
Originally Posted by sleepstar View Post
thanks for all that data. it seems like the product has lubricity additives that at least bring it up to d2 specs, and we lose the biodiesel benefits. i think i may get some b100 and blend a little in with each fillup
The manufacturer warns against mixing HVO and biodiesel.
Since HVO is fully paraffinic, it does not have such good solvency characteristics as fossil diesel fuels which in almost all cases contain 15 ... 30% total aromatics. In Swedish Class 1 the total aromatics are limited to <5%. The less severe solvency may have benefits regarding material compatibility but on the other hand possible impurities existing in fuels may precipitate easier.
It is not recommended to store a blend of HVO and FAME. This is caused by the fact that there may be some impurities in FAME, and there is a risk for precipitation if FAME is mixed with low aromatic or aromatic free fuel. Precipitation may take place even at temperatures higher than cloud point of the blend.
Due to limited tank capacity the same tank might be used for FAME and HVO. If the same tank is used either for FAME or HVO, normal procedure with quality change should be performed, like as low as possible level of FAME in storage tank before changing to HVO. Blending temperatures should be well above both fuels' cloud points. And when changing back to FAME, HVO level in storage tank, should be as low level as possible.There is also a remarkable difference in densities between FAME and HVO which may have a negative effect on blending behaviour.
When HVO and FAME are blended into fossil diesel fuel, it is recommended to start by mixing diesel fuel and HVO since HVO and diesel fuel are chemically close to each other. After that FAME may be added to this blend.
A maximum 7 % of high quality FAME (total monoglyserides max 0.3 wt%) can be mixed with HVO as defined by TS 15940. Precipitation risk of FAME’s impurities increases if more or low quality FAME is used. CONCAWE has given a recommendations for EN590 diesel SMG (saturated monoglyceride) content [Engelen, 2009] as well as Annex C in the FAME standard EN 14214.
These recommenddations can be used also when blending FAME with HVO. Swedish class 1 and HVO behave similarly when blending with FAME so the same SMG levels in final blend can be required also for HVO. The max level of SMG coming from FAME can be 20 mg/kg in final blend.
From page 23 of HVO handbook.

A member on another forum found out Propel Fuels adds a product called "Hitec 4142" to the HVO for lubricity. Hopefully they use enough of it so it doesn't cause any issues but they're still sticking to the US 520 micron standard instead of the European 460 micron standard.
PDF info on the additive
CENSORED due to not family friendly words

Last edited by tjts1; 02-20-2015 at 04:33 PM.
Reply With Quote