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Honda’s own manual calls for 10W-40 (10W-30 in cold winters, 20W-50 in hot summers) meeting SG or higher, and the VTX 1300’s wet clutch means “energy conserving” automotive oils are off the table — they contain friction modifiers that can cause clutch slip. Every oil below is a motorcycle-specific 10W-40 (or a friction-modifier-free alternative) that VTX owners actually run.
| # | Product | Price | Where to buy |
|---|---|---|---|
| 1 | AMSOIL 10W-40 100% Synthetic Motorcycle Oil (MCF) | $12-$16/qt | Amazon · eBay |
| 2 | Mobil 1 Racing 4T 10W-40 | $12-$14/qt | Amazon · eBay |
| 3 | Motul 5100 10W-40 4T Technosynthese | $18-$21/qt | Amazon · eBay |
| 4 | Pro Honda GN4 10W-40 | $13-$14/qt | Amazon · eBay |
| 5 | Castrol Power1 4T 10W-40 Full Synthetic | $8-$9/qt | Amazon · eBay |
| 6 | Bel-Ray EXS Full Synthetic Ester 10W-40 | $18-$22/L | Amazon · eBay |
| 7 | Maxima Pro Plus 10W-40 Synthetic | $15-$18/L | Amazon · eBay |
| 8 | Shell Rotella T6 15W-40 Full Synthetic | $26-$31/gal | Amazon · eBay |
| 9 | Royal Purple Max-Cycle 10W-40 | $15-$18/qt | Amazon · eBay |
| 10 | Yamalube Performance All Purpose 4-Stroke 10W-40 | $11-$14/qt | Amazon · eBay |
The picks, in detail
AMSOIL 10W-40 100% Synthetic Motorcycle Oil (MCF)
One of the two brands VTX riders cite most often for scoring at the top of independent oil tests — a full synthetic built for air- and liquid-cooled V-twins.
- 100% synthetic, JASO MA/MA2 rated
- 10W-40 viscosity matching Honda’s spec
- No energy-conserving friction modifiers
- Strong reputation in independent oil analysis
- Long service-interval formulation
- Premium price versus conventional oils
Mobil 1 Racing 4T 10W-40
The other most-cited VTX pick — a motorcycle-specific full synthetic (not the automotive Mobil 1) built for wet-clutch engines.
- Full synthetic, JASO MA2 rated
- 10W-40 viscosity
- Wet-clutch safe formulation
- Widely available at auto parts stores
- Strong reputation among VTX/cruiser riders
- Not the same product as automotive Mobil 1 — don’t substitute
Motul 5100 10W-40 4T Technosynthese
A semi-synthetic ester-blend oil popular for its smooth clutch engagement, JASO MA2-certified for wet-clutch V-twins like the VTX.
- Technosynthese ester blend
- JASO MA2 certified
- Smooth shifting/clutch engagement
- Widely used across cruiser and sport-touring communities
- Good cold-start flow
- Pricier than conventional 10W-40 options
Pro Honda GN4 10W-40
Honda’s own-branded conventional oil, formulated in-house for Honda engines including cruisers like the VTX.
- Honda in-house formulation
- 10W-40 conventional
- JASO MA rated
- Formulated specifically for Honda engines
- Widely stocked at Honda dealers
- Conventional, not synthetic — shorter change intervals
Castrol Power1 4T 10W-40 Full Synthetic
A budget-friendly full synthetic that still meets JASO MA2, making it one of the cheapest synthetic options that’s still wet-clutch safe.
- Full synthetic
- JASO MA2 rated
- 10W-40 viscosity
- Lowest-priced full synthetic in this list
- Sold in convenient multi-packs
- Less of a cruiser-specific reputation than Mobil 1/AMSOIL
Bel-Ray EXS Full Synthetic Ester 10W-40
An ester-based full synthetic aimed at higher-stress engines, sold through most powersports and motorcycle parts retailers.
- Ester-based full synthetic
- JASO MA2 rated
- Sold in 1L and 4L sizes
- High-quality ester base stock
- Good high-temperature stability
- Sold by the liter rather than the U.S. quart
Maxima Pro Plus 10W-40 Synthetic
A racing-oil-brand synthetic that exceeds API SL and JASO MA2 specs, commonly used across cruisers and sport bikes alike.
- Synthetic blend exceeding JASO MA2
- 10W-40 viscosity
- Sold in 1L and gallon sizes
- Strong reputation from racing-oil heritage
- Good availability at powersports shops
- Gallon pricing is a bigger upfront spend
Shell Rotella T6 15W-40 Full Synthetic
A diesel-rated oil with no friction modifiers, which is why it’s become a well-known budget wet-clutch-safe option among VTX and Harley riders — not motorcycle-branded, but functionally compatible and far cheaper by the gallon.
- Full synthetic, friction-modifier-free
- 15W-40 viscosity
- Sold by the gallon
- Dramatically cheaper per quart than motorcycle-branded oils
- No energy-conserving additives to cause clutch slip
- 15W-40 is heavier than Honda’s 10W-40 spec — best for hot-climate summer use
Royal Purple Max-Cycle 10W-40
A premium synthetic marketed specifically for motorcycle engines and wet clutches, sold in single quarts or case packs.
- High-performance synthetic
- JASO MA2 rated
- 10W-40 viscosity
- Premium additive package
- Well-regarded on motorcycle forums
- One of the pricier options here
Yamalube Performance All Purpose 4-Stroke 10W-40
A cross-brand-compatible oil despite the Yamaha name — oil brand doesn’t need to match bike brand, only the JASO/viscosity spec matters, and this one meets it.
- JASO MA2 rated
- 10W-40 viscosity
- Mineral-base formulation
- Budget-friendly
- Meets the same wet-clutch safety spec as pricier options
- Mineral base rather than full synthetic
Buying tips
- Never use an automotive oil labeled “Energy Conserving” — the friction modifiers in it can cause wet-clutch slip on the VTX.
- Match the season to the viscosity Honda recommends: 10W-30 for cold winters, 10W-40 for all-around use, 20W-50 for hot summers.
- Diesel-rated oils like Shell Rotella T6 work because they’re friction-modifier-free, but check the viscosity against the season — 15W-40 runs heavier than Honda’s default 10W-40.
- The VTX’s liquid-cooled design means it doesn’t need the heavier 20W-50 as often as air-cooled cruisers do; stick with 10W-40 unless you’re riding in sustained high heat.
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