ISO VG 100

ISO VG 100 collects 52 oils from Castrol, Chevron, Mobil, Shell in this catalogue. The ISO viscosity grade is the oil's thickness at 40 °C, plus or minus 10 percent. Match the grade the machine manual names before you compare brands. The figures below are the makers' typical values, not a batch certificate. Confirm the current data sheet before you fill a machine. Published viscosity indexes run from 90 to 250. A higher index thins less between 40 °C and 100 °C. That matters in a cold start and in a hot gearbox, and it is not the same thing as the ISO grade. Pour points run from -51 °C to -6 °C. The machine should still start at least 5 °C warmer than the pour point of the oil you pick. 13 are flagged synthetic and 39 are not. Synthetic here means the maker said so. It is not a viscosity grade and it is not, by itself, a reason to leave the ISO grade the manual asks for. 4 of these oils are PAG (polyalkylene glycol). PAG does not mix with mineral oil or PAO. Drain and flush before a change into or out of a PAG, and do not treat a PAG as an equivalent of either. 7 can be bought in a small package from the retailers linked on each oil page. The others have no listing yet. A missing buy button is not a comment on the oil. Use the table to sort the grade, the viscosity index and the pour point, then open an oil for its data sheet, its equivalents and its buy links. Equivalents on this site are other published oils in the same application and grade. They are not exact substitutes, and the OEM specification still governs.

Oil	ISO	KV40	VI	Pour	Buy
Castrol Tribol HM 100	100	100	250	-26	—
Shell Omala S3 W 100	100	103	238	-42	—
Chevron Cetus EliteSyn NG 100	100	100	227	-48	—
Chevron Clarity Synthetic EA 100	100	100	210	-48	—
Castrol Optigear Synthetic 800/100	100	100	205	-45	—
Mobil Glygoyle 100	100	100	190	-30	—
Mobil Mobil SHC 627	100	100	162	-48	—
Castrol Optigear Synthetic PD 100 ES	100	105	159	-51	—
Chevron Clarity AW 100	100	92.8	153	-35	—
Chevron Rando HDZ 100	100	97.8	146	-40	—
Shell Tellus S2 VX 100	100	100	143	-30	—
Chevron Cetus PAO 100	100	100	142	-48	—
Shell Tellus S2 V 100	100	100	142	-30	—
Castrol Optigear Synthetic A/100	100	98	140	-45	—
Chevron Cetus Hipersyn 100	100	105	140	-35	Yes
Castrol Optigear Synthetic 1710/100	100	100	138	-36	—
Mobil Excel 100	100	99.8	127	-34	Yes
Chevron Clarity Saw Guide Oil 100	100	95	110	-33	—
Chevron Rando HD 100	100	98.9	106	-15	—
Castrol Optigear BM 100	100	100	105	-21	—
Shell Tellus S2 MX 100	100	100	105	-24	—
Castrol Optigear 1100/100	100	100	100	-27	—
Chevron GST 100	100	100	100	-30	—
Chevron Meropa 100	100	100	100	-29	—
Mobil Rarus 427	100	104.6	100	—	Yes
Shell Omala S2 G 100	100	100	100	-24	Yes
Shell Tellus S3 M 100	100	100	100	-33	—
Mobil Vacuoline 525	100	—	99	-24	—
Shell Omala S2 GX 100	100	100	99	-24	—
Chevron Aries 100	100	100	98	-30	—
Mobil DTE 27	100	95.3	98	-21	—
Mobil Nuto H 100	100	96	98	-18	—
Castrol Optigear EP 100	100	102	97	-24	—
Chevron Regal R&O 100	100	95	97	-15	Yes
Mobil 600 XP 100	100	100	97	-24	Yes
Shell Morlina S2 B 100	100	100	97	-18	—
Shell Tellus S2 M 100	100	100	96	-24	—
Castrol Hyspin AWS 100	100	100	95	-18	—
Mobil PM 100	100	100	95	-6	—
Mobil Teresstic 100	100	100	95	-12	—
Shell Morlina S1 B 100	100	100	95	-9	—
Shell Morlina S3 BA 100	100	100	95	-12	—
Chevron Cetus DE 100	100	96	92	-39	—
Mobil Heavy	100	95.1	92	-15	Yes
Castrol Molub-Alloy Chain Oil 100	100	100	90	—	—
Castrol Hyspin VG 100	100	100	—	-15	—
Chevron Red Chain Bar Oil 100	100	95	—	-27	—
Shell Air Tool Oil S2 A 100	100	100	—	-24	—
Shell Corena AP 100	100	100	—	-39	—
Shell Corena S2 P 100	100	100	—	-33	—
Shell Corena S4 P 100	100	100	—	-39	—
Shell Turbo Oil T 100	100	100	—	-9	—