{"product_id":"penngrade-1-high-performance-engine-oil-sae-10w-40-1-qt-high-zinc-zddp-27-7144-6","title":"PennGrade 1 Engine Oil SAE 10W-40 | Air-Cooled VW \u0026 Porsche | High-Zinc\/ZDDP, 1 qt (27-7144-6)","description":"\u003ch2\u003e\u003cb\u003ePennGrade 1 High-Performance Engine Oil, SAE 10W-40 — High-Zinc\/ZDDP (1 qt)\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp\u003ePennGrade 1 High-Performance Engine Oil, SAE 10W-40 — a \u003cb\u003esynthetic-blend, high-zinc engine oil\u003c\/b\u003e designed for air-cooled, classic, and flat-tappet engines. Outstanding film strength under thermal stress, strong anti-wear protection, and shock-load capability that modern low-zinc oils simply cannot match.\u003c\/p\u003e\n\u003cp\u003e10W-40 is a good \u003cb\u003emiddle-ground multi-grade\u003c\/b\u003e — better cold-start flow than straight 30 weight, more film protection at operating temperature than 10W-30. A reasonable choice in moderate climates for engines with stock-spec bearing clearances.\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eVehicle Fitment\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eAir-cooled VW (Type 1 \/ 2 \/ 3 \/ 4):\u003c\/b\u003e Beetle, Bus, Karmann Ghia, Thing, and Type 3 — stock and built\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePorsche:\u003c\/b\u003e 356, 911, 912, 914 (consult your manual for grade selection)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAny flat-tappet engine:\u003c\/b\u003e Requiring elevated zinc\/phosphorus anti-wear additives\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVintage \u0026amp; classic engines:\u003c\/b\u003e Built to pre-emissions API specifications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eWhy Choose PennGrade 1?\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003ePennGrade 1 is the modern brand name for the legendary \"Brad Penn\" green oil — refined in Pennsylvania from paraffinic crude, with a high-zinc additive package (ZDDP) that has long made it the favorite of vintage, air-cooled, and flat-tappet engine builders. \u003cb\u003eMade in the USA.\u003c\/b\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cb\u003eKey Features \u0026amp; Benefits\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eHigh-zinc\/ZDDP protection:\u003c\/b\u003e Strong anti-wear and shock-load capability that modern low-zinc oils cannot match.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSynthetic-blend film strength:\u003c\/b\u003e Outstanding film strength under thermal stress.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMiddle-ground multi-grade:\u003c\/b\u003e Better cold-start flow than straight 30 weight, more film protection than 10W-30.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eTechnical Specifications\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eEMPI Part #:\u003c\/b\u003e 27-7144-6\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGrade:\u003c\/b\u003e SAE 10W-40\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVolume:\u003c\/b\u003e 1 quart bottle, sold individually (case of 12)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eUPC:\u003c\/b\u003e 707924570458\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCountry of Origin:\u003c\/b\u003e USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cb\u003eFrequently Asked Questions\u003c\/b\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eWhen should I choose 10W-40?\u003c\/b\u003e It's a good middle-ground multi-grade — better cold-start flow than a straight 30 weight and more film protection at operating temperature than 10W-30. A reasonable choice in moderate climates for engines with stock-spec bearing clearances.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWhy does ZDDP matter for air-cooled VWs?\u003c\/b\u003e Modern API SP\/SN oils have stripped most of the zinc dialkyldithiophosphate (ZDDP) anti-wear additive to protect catalytic converters. Air-cooled VW engines have no catalytic converters but do have flat-tappet camshafts that depend on a high zinc\/phosphorus barrier layer; running modern low-zinc oil in a vintage flat-tappet engine will wipe a cam lobe in surprisingly few miles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cb\u003eExplore Related Categories\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003eStock up for your build: the full \u003ca href=\"\/collections\/penngrade\"\u003ePennGrade Oils \u0026amp; Fluids\u003c\/a\u003e line, \u003ca href=\"\/collections\/all-vw-aircooled\"\u003eAll VW Air-Cooled Parts\u003c\/a\u003e, and \u003ca href=\"\/collections\/all-porsche\"\u003eAll Porsche Parts\u003c\/a\u003e.\u003c\/p\u003e","brand":"PennGrade 1","offers":[{"title":"Default Title","offer_id":45031564509299,"sku":"27-7144-6","price":13.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/2760\/1523\/files\/10w-40-SB-Oil-bottle.png?v=1779613349","url":"https:\/\/www.washburnsmetal.com\/products\/penngrade-1-high-performance-engine-oil-sae-10w-40-1-qt-high-zinc-zddp-27-7144-6","provider":"Washburn's Metal","version":"1.0","type":"link"}