Diesel Oil Comparisons
Head-to-head breakdowns for Class 8 diesel oils — OEM approvals, wear protection data, extended drain intervals, and ACEA ratings compared side by side.
AMSOIL vs Competitors
AMSOIL WINS
AMSOIL vs Shell Rotella T6
6× wear protection vs no published data. Dual CK-4/FA-4 rating vs CK-4 only. Both claim 60K drain intervals.
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AMSOIL WINS
AMSOIL vs Mobil Delvac 1 ESP
AMSOIL wins on wear data and extended drain. Delvac 1 ESP leads on ACEA E4/E7/E9 and European OEM coverage.
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AMSOIL WINS
AMSOIL vs Pennzoil Ultra Platinum Diesel
Pennzoil’s PurePlus base oil is genuinely clean — but AMSOIL still leads on documented wear data and FA-4 dual rating.
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AMSOIL WINS
AMSOIL vs Castrol Vecton
Castrol Vecton has strong European OEM approvals (MB, MAN) but no extended drain claim and no FA-4 option.
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AMSOIL WINS
AMSOIL vs Petro-Canada Duron-E
Duron-E is the dominant Canadian fleet brand. HT Purity base oil, ACEA E4/E7/E9 — solid product. AMSOIL wins on drain documentation and wear data.
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Brand vs Brand
HEAD-TO-HEAD
Shell Rotella T6 vs Mobil Delvac 1 ESP
Both are CK-4 full synthetics with similar North American OEM coverage. Delvac 1 ESP adds ACEA E4/E7 and European approvals.
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HEAD-TO-HEAD
AMSOIL vs Mobil Delvac 1
Mobil Delvac 1 (conventional line) compared against AMSOIL Signature Series — specs, OEM coverage, and total cost.
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HEAD-TO-HEAD
AMSOIL vs Mobil Delvac MX
Mobil Delvac MX is the conventional synthetic blend option. Full synthetic AMSOIL vs a semi-synthetic — drain interval and protection gap explained.
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