AMSOIL 10W-30 100% SYNTHETIC ATV/UTV MOTOR OIL

Honda machines that specify 10W-30

Use it in ATVs and UTVs that require a 10W-30 motor oil, including those built by Honda. The formulation was developed specifically for Honda quads and side-by-sides as a cost-effective alternative to the factory branded bottle, which is a narrower application list than the multi-brand ones attached to the heavier grades in the same range. Honda builds across a wide displacement spread, and those machines do not all take the same grade.

Grade is only half of it. Your machine also has to specify API SJ engine oil performance and JASO MA frictional performance. A model naming a different viscosity or a higher API category falls outside this oil no matter what badge is on the fender, so let the manual for your exact model and year settle it.

API SJ and JASO MA cover different ground

API SJ describes what the oil does inside the engine, covering wear, deposits, and oxidation to the level that category defines. JASO MA describes how the oil behaves between clutch plates. The two are independent, and an oil can clear one without clearing the other. A grade marking like 10W-30 tells you neither, which is why the lines printed under it are the ones worth reading.

Wet-clutch compatibility here comes from something left out rather than something added. The formulation contains no friction modifiers and promotes smooth shifting and positive clutch engagement. Friction modifiers earn their keep in a car engine, where less friction returns fuel economy, and they are exactly the wrong ingredient where the same fluid has to let a clutch pack lock up under load.

Three percent evaporation loss

Noack volatility measures 3 percent weight loss under ASTM D5800, the lowest figure among the five grades here, which run 4.7 percent for the 10W-40 and 5W-50, 4.8 for the 5W-40, and 6.7 for the 0W-50. The test holds a sample at high temperature and weighs what leaves. What leaves is the lightest part of the oil, so a low number means less topping up between services and less thickening of what stays.

The ignition properties under ASTM D92 sit alongside it, with a flash point of 242°C (468°F) and a fire point of 264°C (507°F). Both come from heating oil in an open cup until the vapor above it lights. They describe the fluid rather than telling you how hot a running engine gets, and both sit far above normal sump temperatures.

The lightest film in the range

Kinematic viscosity is 65.7 cSt at 40°C and 10.5 cSt at 100°C under ASTM D445, with a viscosity index of 148 under ASTM D2270. Those are the lowest numbers in the range on all three counts. A lighter oil circulates with less resistance and gets into tight clearances faster, which is what an engine designed around a 30-weight is built to expect. Fitting a heavier grade to chase film thickness works against that design.

High-temperature, high-shear viscosity is 3.3 cP at 150°C under ASTM D5481. The test drives oil through a narrow clearance at speed and heat to estimate the film left in a loaded bearing, and this is the thinnest of the five grades because the grade itself is the lightest. Comparing it against a 50-weight result tells you more about the grades than about the oils.

The ASTM D4172 four-ball wear test spins one ball against three clamped in an oil bath at 150°C, 1,800 rpm, and 40 kg for one hour. The scar left on the fixed set measured 0.38 mm, matching the 5W-40 and coming in under the heavier grades. Take it as a bench comparison under one fixed load rather than a projection of engine life.

Cold flow, hard work, and packaging

Pour point is -42°C (-44°F) under ASTM D97, the shallowest of the five grades, which follows from the 10W winter rating. Pour point is a laboratory flow property recorded as the last temperature at which a chilled sample still moves, and it does not translate into a guaranteed cranking temperature. The oil stays fluid in subzero temperatures to keep startup protection available.

Severe-service formulation and synthetic technology protect hot, high-revving engines against wear and hold reserve protection against heat for heavily loaded engines. Advanced synthetic chemistry resists oxidation and protects against extreme heat to help prevent sludge and varnish, and the oil aids in cooling shrouded engines. Utility work loads an engine at low travel speed, which is exactly where that reserve earns its keep.

AUV30QT-EA is the individual quart bottle and AUV30QT-CA the case of twelve quarts. Package size is not a capacity guide, since sump capacities differ across the Honda machines on the list, so check the fill quantity in your manual. A top-up from another bottle is survivable, because the oil is compatible with synthetic and conventional grades, but it costs service life, performance benefit, and any extended drain support. Recycle used oil and the empty bottle.

Verified specifications