PETROLEUM QUALITY INSTITUTE OF AMERICA
The Data Speak for Itself...
Product Tested
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Kubota Tractor Corporation
Company and Product Information
Corporate Office:
Kubota Tractor Corporation
Grapevine, TX 76051
Website(s): www.kubotausa.com
Kubota Tractor Corporation, Grapevine, Texas, is the U.S. marketer and distributor of Kubota-engineered and manufactured machinery and equipment, including a complete line of tractors of up to 170 Gross hp, performance-matched implements, compact and utility-class construction equipment, consumer lawn and garden equipment, hay tools and spreaders, commercial turf products and utility vehicles.
Kubota®
SAE 15W-40 Engine Oil
Product: Kubota®
Viscosity Grade: SAE 15W-40
Labeled: API CK-4, CH-4, CI-4 PLUS/SN
Manufactured For: Kubota Tractor Corporation, Grapevine, TX
Purchased at: Millstone Township, NJ
Date of purchase: 6/27/2018
Website(s): www.kubotausa.com
Test Results and Assessment:
The results of the tests conducted on this sample meet the SAE J300 specifications for the SAE Viscosity Grade listed on the product label, and are consistent with the listed API Service Categories.
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Physical Properties |  |
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| Elemental Analysis | |
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| Labeling | |
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Note1: Although laboratory tests alone cannot be used to establish if engine oil meets an API Service Category, they can be used to determine if it doesn't. Note2: The specification for cold cranking viscosity includes only a maximum value; the minimum value shown in the “standard” area of the chart is truncated for illustrative purposes.
| PHYSICAL TESTS (click for test details) - a | Standard | Kubota® |
| TBN, mg KOH/g (ASTM D2896) | 9.24 | |
| Viscosity @ 100ºC, cSt (ASTM D445) | 12.5 to <16.3 | 14.9 |
| Viscosity @40ºC, cSt (ASTM D445) | 111 | |
| Viscosity Index (ASTM D2270) | 139 | |
| Viscosity @-20ºC mPa s (cP) (ASTM D5293) | 7,000 Max | 6,158 |
| ELEMENTAL ANALYSIS (click for test details) - a, b | ||
| Additives | ||
| Calcium, ppm | 1,909 | |
| Magnesium, ppm | 427 | |
| Phosphorus, ppm | 1,200 Max-c | 1,077 |
| Zinc, ppm | 1,238 | |
| Molybdenum, ppm | 67 | |
| Barium, ppm | <1 | |
| Boron, ppm | 9 | |
| Silicon, ppm | 5 | |
| Potassium, ppm | 1 | |
| Manganese, ppm | <1 | |
| Titanium, ppm | <1 | |
| Copper, ppm | <1 | |
| Sodium, ppm | 1 | |
| Vanadium, ppm | <1 | |
| Contaminants | ||
| Silver, ppm | <1 | |
| Aluminum, ppm | <1 | |
| Chromium, ppm | <1 | |
| Iron, ppm | 1 | |
| Nickel, ppm | <1 | |
| Lead, ppm | <1 | |
| Antimony, ppm | <1 | |
| Tin, ppm | <1 | |
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