PennGrade 1 Engine Oil SAE 30 Straight Weight | Air-Cooled VW & Porsche | High-Zinc, 1 qt (27-7139-6)

PennGrade 1 High-Performance Engine Oil, SAE 30 Straight Weight — High-Zinc (1 qt)

PennGrade 1 High-Performance Engine Oil, SAE 30 (straight weight) — a synthetic-blend, high-zinc engine oil 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.

Straight-weight SAE 30 is the original VW factory recommendation for moderate temperatures. Some traditionalists still prefer single-weight oils for vintage engines on the theory that they avoid the viscosity-index improvers in multi-grades that can shear down under stress. Best for warm climates and not for cold starts below ~50°F.

Vehicle Fitment

• Air-cooled VW (Type 1 / 2 / 3 / 4): Beetle, Bus, Karmann Ghia, Thing, and Type 3 — stock and built
• Porsche: 356, 911, 912, 914 (consult your manual for grade selection)
• Any flat-tappet engine: Requiring elevated zinc/phosphorus anti-wear additives
• Vintage & classic engines: Built to pre-emissions API specifications

Why Choose PennGrade 1?

PennGrade 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. Made in the USA.

Key Features & Benefits

• Original factory grade: Straight-weight SAE 30, the original VW factory recommendation for moderate temperatures.
• Single-weight simplicity: Avoids the viscosity-index improvers in multi-grades that can shear down under stress.
• High-zinc/ZDDP protection: Strong anti-wear and shock-load capability that modern low-zinc oils cannot match.

Technical Specifications

• EMPI Part #: 27-7139-6
• Grade: SAE 30 (straight weight)
• Volume: 1 quart bottle, sold individually (case of 12)
• UPC: 707924570472
• Country of Origin: USA

Frequently Asked Questions

• When should I run straight-weight SAE 30? It's the original VW factory recommendation for moderate temperatures — best for warm climates and not for cold starts below ~50°F.
• Why do some builders prefer single-weight oil? Some traditionalists prefer single-weight oils for vintage engines on the theory that they avoid the viscosity-index improvers in multi-grades that can shear down under stress.
• Why does ZDDP matter for air-cooled VWs? 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.

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