Motor Oil Approvals - OilSpec Guide

OEM Approvals

Mercedes MB 229.5 Vs 229.51: the Approval Split Explained

I’m here to clarify the key differences between Mercedes MB 229.5 and 229.51 approvals that could impact your vehicle’s performance—discover which is right for you.

OilSpec Guide Team
February 21, 2026

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Oil Analysis & Diagnostics

Viscosity Out of Grade: The 3 Root Causes That Show Up in Reports

Viscosity out of grade often points to three main issues you might…

OilSpec Guide Team
May 14, 2026

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15 Best Scan Tools for Toyota and Lexus in 2026

Just explore these top 15 scan tools for Toyota and Lexus in 2026 to find the perfect…

OilSpec Guide Team
May 13, 2026

Oil Analysis & Diagnostics

Fuel Dilution in Lab Reports: When It’s ‘Normal’ vs a Red Flag

Just understanding when fuel dilution is normal versus a red flag can save your engine…

OilSpec Guide Team
May 13, 2026

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15 Best Air Quality Monitors for Garage (VOC + CO) in 2026

Stay informed with the 15 best garage air quality monitors of 2026, revealing top…

OilSpec Guide Team
May 13, 2026