shiyouchanpinshigeleitingleidefuzahunhewu，qizhongmeiyizhongtingleidejiegoubutong
，tamendediwenxingnengyehubuxiangtong。dafenzizhenggouwantinghefangxiangtingdediwenxingjiaocha，huanwantinghexitingdediwenxingnengjiaohao

，zaitongyitingleizhong，diwenxingnengsuifenziliangdezengdaerbiancha。

   與油品中含有的膠質、瀝青質及表麵活性物質的多少有關。

   油品中含有的膠質、瀝青質這些物質能吸附在石蠟結晶中心的表麵上，能阻止石蠟結晶的生長，致使油品的冷凝點。傾點、ningdianxiajiang。hanyouhuanwansuanyandengbiaomianhuoxingwuzhideyoupin，qiningdianbibuhanyoubiaomianhuoxingwuzhideyoudi，yuanyinshizhexiebiaomianhuoxingwuzhiengxifuzaiganggangxingchengdelajiejingkelishang

，tongyangzuzhilelajiejingdechangda，shilajiejingyixiaoerfensandexingshifensanzaiyouzhongbunengxingchengwangzhuangjiegou，bixuzaijiangdiwendu。yinci，dangyoupintuochulejiaozhi、瀝青質及表麵活性物質後，其冷凝點
、傾點、凝點便升高
，而加入某些表麵活性物質（如降凝添加劑）
，則可以降低油品的凝點，使油品的低溫流動性能得到改善。

   （2）與油品中的水分有關

   水(shui)分(fen)也(ye)是(shi)影(ying)響(xiang)油(you)品(pin)低(di)溫(wen)性(xing)能(neng)的(de)重(zhong)要(yao)因(yin)素(su)。特(te)別(bie)是(shi)燃(ran)料(liao)中(zhong)的(de)溶(rong)解(jie)水(shui)
，在(zai)低(di)溫(wen)下(xia)呈(cheng)細(xi)小(xiao)的(de)冰(bing)晶(jing)析(xi)出(chu)
，堵(du)塞(sai)發(fa)動(dong)機(ji)燃(ran)料(liao)係(xi)統(tong)的(de)過(guo)濾(lv)器(qi)，減(jian)少(shao)供(gong)油(you)量(liang)，嚴(yan)重(zhong)時(shi)造(zao)成(cheng)事(shi)故(gu)。