towade,
Schaeffer does make good oil, I do not have a chart for them but here is what I found for Deere oil when I was looking.
John Deere +50 oil
Plus-50 15W-40 Engine Oil
Applications
Plus-50 provides the best performance and wear protection for John Deere diesel engines.
Excellent for use in all diesel engines requiring a 15W-40 oil with CI-4 Plus performance.
Excellent for heavy-duty trucks, tractors, pickups, combines and other diesel engines.
Service Ratings
API (diesel): CI-4 Plus, CI-4,
CH-4, CG-4, CF-4, CF
API (gasoline): SL, SJ, SH
ACEA: E5, E4, E3, E2, E1
JASO: DH-1
Global: DHD-1
John Deere: JDQ 78A
Cummins: CES20078, 77, 76, 72, 71
Daimler Chrysler: 228.5, 228.3
Mack: EO-N Premium Plus 03, EO-N Plus,
EO-M Plus, EO-M, EO-L Plus, EO-L
Volvo: VDS-3, VDS-2
Man: M3275
MTU/DDC: Type 2, 93K214
Renault VI: RLD
Allison: C-4
Caterpillar: TO-2
Military: MIL-PRF-2104G
Test Analysis 15W-40
Viscosity @ 40ーC................... 119 cSt
Viscosity @ 100ーC.................. 15.6 cSt
Viscosity index.................... 139
HTHS @ 150ーC....................... 4.4 cP
Pour point......................... -33ーC
Flash point........................ 220ーC
Total base number (TBN)..... 13.5 mg KOH/g
Sulfated ash level................. 1.55 mass %