1、根據齒輪工(gong)作條(tiao)件的(de)苛(ke)刻程度選用使用等級。

齒(chi)輪(lun)(lun)工(gong)作(zuo)條(tiao)件的(de)苛(ke)刻程度是由齒(chi)輪(lun)(lun)的(de)類型及其工(gong)作(zuo)時的(de)負荷和表面滑移速度決定(ding)的(de)。普通齒(chi)輪(lun)(lun)傳動可選(xuan)(xuan)用普通車輛齒(chi)輪(lun)(lun)油(you)(you)，準雙曲(qu)面齒(chi)輪(lun)(lun)傳動必(bi)須選(xuan)(xuan)用準雙曲(qu)面齒(chi)輪(lun)(lun)油(you)(you)。若汽車在山區或滿(man)載拖掛行駛，并(bing)經常處(chu)于高(gao)負荷狀態下(xia)，工(gong)作(zuo)苛(ke)刻、油(you)(you)溫(wen)較高(gao)，也可以選(xuan)(xuan)用準雙曲(qu)面齒(chi)輪(lun)(lun)油(you)(you)。

2、依據(ju)季(ji)節氣溫選擇(ze)粘度等級。

齒(chi)輪的(de)(de)低(di)(di)(di)溫(wen)(wen)(wen)粘(zhan)(zhan)度(du)(du)(du)(du)達150000mPa.s時的(de)(de)較高溫(wen)(wen)(wen)度(du)(du)(du)(du)決定其(qi)(qi)適用(yong)(yong)(yong)的(de)(de)較低(di)(di)(di)氣(qi)(qi)溫(wen)(wen)(wen)。因此齒(chi)輪油(you)的(de)(de)粘(zhan)(zhan)度(du)(du)(du)(du)等級一(yi)般是(shi)根據(ju)不同(tong)地區(qu)或季(ji)節的(de)(de)氣(qi)(qi)溫(wen)(wen)(wen)情況來選擇(ze)(ze)的(de)(de)。氣(qi)(qi)溫(wen)(wen)(wen)高時，選擇(ze)(ze)粘(zhan)(zhan)度(du)(du)(du)(du)高的(de)(de)齒(chi)輪油(you)；反之，氣(qi)(qi)溫(wen)(wen)(wen)低(di)(di)(di)時，選擇(ze)(ze)粘(zhan)(zhan)度(du)(du)(du)(du)低(di)(di)(di)的(de)(de)齒(chi)輪油(you)。如長(chang)江流域及(ji)其(qi)(qi)他地區(qu)冬(dong)(dong)季(ji)氣(qi)(qi)溫(wen)(wen)(wen)不低(di)(di)(di)于(yu)-10℃的(de)(de)地區(qu)，全(quan)年(nian)可用(yong)(yong)(yong)90號(hao)油(you)。長(chang)江以北冬(dong)(dong)季(ji)氣(qi)(qi)溫(wen)(wen)(wen)不低(di)(di)(di)于(yu)-26℃的(de)(de)寒區(qu)，全(quan)年(nian)可用(yong)(yong)(yong)80W/90油(you)。黑龍江、內蒙古(gu)、新疆(jiang)等冬(dong)(dong)季(ji)氣(qi)(qi)溫(wen)(wen)(wen)在-26℃以下(xia)的(de)(de)嚴寒區(qu)，冬(dong)(dong)季(ji)使用(yong)(yong)(yong)75W號(hao)油(you)，夏季(ji)換用(yong)(yong)(yong)90號(hao)油(you)。其(qi)(qi)他地區(qu)全(quan)年(nian)可用(yong)(yong)(yong)85W/90油(you)。