CamperHardlyKnowHer

Jayco Octane 312

Travel trailerbuilt 2017–18Mixed build tierFindable on the used market
WHAT ONE COSTS
—price not published

The maker never published an MSRP for this floorplan. Unknown is not cheap — treat any asking price against comparable models, not against zero.

WHAT IT WEIGHS BEHIND YOUR TRUCK
~9,596 lbestimated as towed, for 2 people

dry weight 7,945 lb + fresh water (102 gal, full) 851 lb + propane + battery 200 lb + gear for 2 600 lb. Brochure dry weight omits water, propane, batteries and your gear; this estimate doesn't.

You want a tow rating around10,665 lb (10% margin)
GVWR (the sticker maximum)11,000 lb
Tongue weight, loaded~1,371 lb (14%)
Cargo capacity3,025 lb
WHICH TOW VEHICLES IT FITS — 33 OF 95

Judged the way the app judges: estimated loaded weight against each vehicle's rating less a 10% margin — per model year, because the 312's published weights held steady.

VEHICLETOW RATINGVERDICT
Chevrolet Silverado / GMC Sierra 1500 (6.2 V8, max tow) '19-2613,300 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 2500HD (Duramax, max tow) '24-2622,500 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 2500HD (Duramax) '20-2318,510 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 2500HD (Duramax) '11-1918,100 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 3500HD (Duramax DRW, gooseneck) '20-2636,000 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 3500HD (Duramax DRW, gooseneck) '11-1923,300 lbfits, loaded, with 10% margin
Chevrolet Silverado 1500 (max tow) '14-1812,500 lbfits, loaded, with 10% margin
Chevrolet Silverado EV (4WT) '24-2612,500 lbfits, loaded, with 10% margin
Ford F-150 (3.5 EcoBoost, max tow) '24-2613,500 lbfits, loaded, with 10% margin
Ford F-150 (3.5 EcoBoost, max tow) '11-1411,300 lbfits, loaded, with 10% margin
Ford F-150 (3.5 EcoBoost, max tow) '15-2013,200 lbfits, loaded, with 10% margin
Ford F-150 (3.5 EcoBoost, max tow) '21-2314,000 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 diesel, gooseneck) '20-2222,800 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 diesel, tow pkg) '17-1918,000 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 diesel) '11-1616,600 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 HO diesel, gooseneck) '23-2623,000 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 diesel DRW, gooseneck) '20-2237,000 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 diesel DRW, gooseneck) '17-1932,500 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 diesel DRW, gooseneck) '11-1621,600 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 HO diesel DRW, gooseneck) '23-2638,000 lbfits, loaded, with 10% margin
Ford F-450 Super Duty (6.7 HO diesel DRW, gooseneck) '23-2640,000 lbfits, loaded, with 10% margin
GMC Sierra EV '24-2612,000 lbfits, loaded, with 10% margin
Nissan Titan XD (Cummins diesel) '16-1912,710 lbfits, loaded, with 10% margin
Ram 1500 (3.0 Hurricane, max tow) '25-2611,610 lbfits, loaded, with 10% margin
Ram 1500 (5.7 Hemi eTorque, max tow) '19-2412,750 lbfits, loaded, with 10% margin
Ram 2500 (6.7 Cummins HO) '19-2620,000 lbfits, loaded, with 10% margin
Ram 2500 (6.7 Cummins) '11-1817,980 lbfits, loaded, with 10% margin
Ram 3500 (6.7 Cummins DRW, gooseneck) '13-1831,210 lbfits, loaded, with 10% margin
Ram 3500 (6.7 Cummins HO DRW, gooseneck) '25-2636,610 lbfits, loaded, with 10% margin
Ram 3500 (6.7 Cummins HO DRW, gooseneck) '19-2437,090 lbfits, loaded, with 10% margin
Rivian R1T '22-2611,000 lbfits, loaded, with 10% margin
Tesla Cybertruck '24-2611,000 lbfits, loaded, with 10% margin
Toyota Tundra (i-Force Max, tow pkg) '22-2612,000 lbfits, loaded, with 10% margin
The 62it doesn't fit
  • Chevrolet Colorado / GMC Canyon (2.7 Turbo HO, tow pkg) '23-26 — over by ~2,666 lb loaded
  • Chevrolet Colorado / GMC Canyon (2.8 Duramax) '15-22 — over by ~2,666 lb loaded
  • Chevrolet Suburban (5.3 V8, max tow) '21-26 — over by ~2,126 lb loaded
  • Chevrolet Tahoe (5.3 V8, max tow) '21-26 — over by ~2,036 lb loaded
  • Chevrolet Traverse (tow pkg) '18-26 — over by ~5,096 lb loaded
  • Chrysler Pacifica '17-26 — over by ~6,356 lb loaded
  • Dodge Durango (5.7 / 6.4 Hemi, tow pkg) '14-26 — over by ~1,766 lb loaded
  • Ford Bronco 4-dr (2.7 EcoBoost, tow pkg) '21-26 — over by ~5,546 lb loaded
  • Ford Expedition (3.5 EcoBoost, tow pkg) '18-24 — over by ~1,226 lb loaded
  • Ford Expedition (3.5 EcoBoost, tow pkg) '25-26 — over by ~956 lb loaded
  • Ford Explorer (3.0 EcoBoost, tow pkg) '20-26 — over by ~4,556 lb loaded
  • Ford F-150 Lightning (max trailer tow) '22-26 — over by ~596 lb loaded
  • Ford Maverick (2.0 EcoBoost, 4K tow pkg) '22-26 — over by ~5,996 lb loaded
  • Ford Ranger (2.3 EcoBoost, tow pkg) '19-23 — over by ~2,846 lb loaded
  • Ford Ranger (2.7 EcoBoost, tow pkg) '24-26 — over by ~2,846 lb loaded
  • Ford Transit (HD tow pkg) '15-26 — over by ~3,386 lb loaded
  • GMC Acadia (tow pkg) '20-26 — over by ~5,096 lb loaded
  • GMC Hummer EV Pickup '22-26 — over by ~2,846 lb loaded
  • GMC Yukon / Yukon XL (5.3 V8, max tow) '21-26 — over by ~2,036 lb loaded
  • Honda Odyssey '18-26 — over by ~6,446 lb loaded
  • Honda Passport (AWD) '19-26 — over by ~5,096 lb loaded
  • Honda Pilot (AWD, tow pkg) '16-26 — over by ~5,096 lb loaded
  • Honda Ridgeline (AWD) '17-26 — over by ~5,096 lb loaded
  • Hyundai Palisade (tow pkg) '20-26 — over by ~5,096 lb loaded
  • Hyundai Santa Cruz (2.5T AWD) '22-26 — over by ~5,096 lb loaded
  • Jeep Gladiator (3.6 V6, max tow) '20-26 — over by ~2,666 lb loaded
  • Jeep Grand Cherokee (5.7 Hemi) '11-21 — over by ~3,116 lb loaded
  • Jeep Grand Cherokee (WL, tow pkg) '22-26 — over by ~4,016 lb loaded
  • Jeep Grand Cherokee L (5.7 Hemi) '21-26 — over by ~3,116 lb loaded
  • Jeep Grand Wagoneer (Hurricane, max tow) '22-26 — over by ~731 lb loaded
  • Jeep Wagoneer (Hurricane, max tow) '22-26 — over by ~596 lb loaded
  • Jeep Wrangler Unlimited 4-dr (tow pkg) '18-26 — over by ~6,446 lb loaded
  • Kia Telluride (tow pkg) '20-26 — over by ~4,646 lb loaded
  • Land Rover Defender '20-26 — over by ~2,216 lb loaded
  • Land Rover Discovery '17-26 — over by ~2,216 lb loaded
  • Lexus GX 550 (tow pkg) '24-26 — over by ~1,411 lb loaded
  • Lexus LX 600 '22-26 — over by ~2,396 lb loaded
  • Mazda CX-90 (3.3 turbo, tow pkg) '24-26 — over by ~5,096 lb loaded
  • Mercedes-Benz Sprinter '19-26 — over by ~2,846 lb loaded
  • Nissan Armada (3.5 twin-turbo, tow pkg) '25-26 — over by ~1,946 lb loaded
  • Nissan Armada (tow pkg) '17-24 — over by ~1,946 lb loaded
  • Nissan Frontier (3.8 V6, tow pkg) '22-26 — over by ~3,161 lb loaded
  • Nissan Pathfinder (tow pkg) '22-26 — over by ~4,196 lb loaded
  • Nissan Titan (5.6 V8, tow pkg) '17-24 — over by ~811 lb loaded
  • Ram 1500 (5.7 Hemi, max tow) '11-18 — over by ~36 lb loaded
  • Ram ProMaster '14-26 — over by ~3,376 lb loaded
  • Rivian R1S '22-26 — over by ~2,666 lb loaded
  • Subaru Ascent '19-26 — over by ~5,096 lb loaded
  • Subaru Outback (XT / Wilderness) '20-26 — over by ~6,446 lb loaded
  • Tesla Model X (tow pkg) '16-26 — over by ~5,096 lb loaded
  • Tesla Model Y (tow pkg) '21-26 — over by ~6,446 lb loaded
  • Toyota 4Runner (4.0 V6) '11-24 — over by ~5,096 lb loaded
  • Toyota 4Runner (i-Force Max) '25-26 — over by ~4,196 lb loaded
  • Toyota Grand Highlander (i-Force Max) '24-26 — over by ~5,096 lb loaded
  • Toyota Highlander (tow pkg) '20-26 — over by ~5,096 lb loaded
  • Toyota Land Cruiser (i-Force Max) '24-26 — over by ~4,196 lb loaded
  • Toyota Sequoia (i-Force Max, tow pkg) '23-26 — over by ~1,026 lb loaded
  • Toyota Sienna '21-26 — over by ~6,446 lb loaded
  • Toyota Tacoma (i-Force Max, tow pkg) '24-26 — over by ~3,746 lb loaded
  • Toyota Tacoma (V6, tow pkg) '16-23 — over by ~3,476 lb loaded
  • Toyota Tundra (5.7 V8, tow pkg) '11-21 — over by ~416 lb loaded
  • Volkswagen Atlas (tow pkg) '18-26 — over by ~5,096 lb loaded
THE SPECS
Length37.9 ft
Height (incl. A/C)11.8 ft
Width8.5 ft
Interior height7.3 ft
GVWR11,000 lb
Dry weight7,945 lb
Dry tongue weight1,135 lb
Cargo capacity3,025 lb
Sleeps8
Axles2
Fresh water102 gal
Grey water45 gal
Black water45 gal
Air conditioning13,500 BTU

A missing row means the maker never published that figure — unknown, not zero.

WHERE PEOPLE SLEEP
  • 1× Front bedroom bed(Permanent)—
  • 1× Power-lift bed above the garage(Stow-away)—
  • 2× Garage convertible sofas(Convertible)—
  • 1× Dinette converts(Convertible)—
HOW IT'S BUILT — 4/5
WallsLaminated fiberglass
FrameAluminum
RoofWalk-on
UnderbellyEnclosed

Jayco (Mixed tier): Octane

YEAR BY YEAR — WHAT CHANGED
  • 2017Introduced
  • 2018Final model year; UVW 7,840 lb
FINDING ONE

Findable — a few listed nationwide most weeks. Why: Jayco is a volume manufacturer; only 2 model years. Estimated from build volume and production span — not a count of live listings.

THE READ

The longest Super Lite of the 2017-2018 run, at nearly 38 ft with a full 102-gal fresh capacity.

OTHER OCTANE FLOORPLANS
161 · 7,500 lb · sleeps 4209 · 8,000 lb · sleeps 6210 · 9,750 lb · sleeps 6222 · 8,250 lb · sleeps 6255 · 9,500 lb · sleeps 6260 · 9,995 lb · sleeps 8265 · 11,250 lb · sleeps 8272 · 9,995 lb · sleeps 9273 · 9,950 lb · sleeps 6277 · 10,995 lb · sleeps 6293 · 11,700 lb · sleeps 8T24Z · 10,250 lb · sleeps 9T26Y · 10,900 lb · sleeps 8T29A · 11,950 lb · sleeps 9the whole line →
Is the 312 your #1 — or just a spec sheet?

These are the facts. Whether it beats the other six thousand rigs for you depends on what you care about — set your priorities as sliders and watch the whole market re-rank around them. Nothing gets hidden, everything gets explained.

Rank it against your setup →

Data compiled from manufacturer spec sheets, retrieved 2026-07.