The 2015 Lexus GS typically requires about 6.4 quarts (6.1 liters) of engine oil with a new filter for its main trims, the GS 350 and GS 450h.
The 2015 GS lineup includes gasoline-powered GS 350 (3.5L V6) and the GS 450h hybrid. Both share the same engine oil capacity when you change the filter. This article outlines the official capacity, model variations, and practical tips for checking and changing the oil.
Oil capacity by model
Before listing the figures, note that capacity can vary slightly by market or exact engine variant; the entries reflect the standard capacity for the primary 2015 GS trims in most regions.
- 2015 GS 350 — 6.4 quarts (6.1 liters) of engine oil with filter
- 2015 GS 450h — 6.4 quarts (6.1 liters) of engine oil with filter
These values refer to a full oil change that includes replacing the oil filter. If you are only topping off an already-filled engine, the amount needed will be less.
Oil type and maintenance tips
Use the recommended oil specification for the 3.5L V6 in the GS, which is typically a full-synthetic 0W-20 or equivalent, as specified in the owner's manual. Follow the manufacturer's suggested service intervals for oil changes, which can vary by driving conditions and region.
What you’ll need for an oil change
Before starting a DIY oil change, gather these items to ensure a safe and complete procedure.
- 0W-20 full-synthetic engine oil (about 6.4 quarts with filter)
- New engine oil filter
- New drain plug washer (if required)
- Funnel, rags, gloves
- Oil catch pan and jack stands or ramps
- Wrench or socket set for the drain plug
- Car jack or ramps and wheel chocks
Having the right supplies helps ensure a clean, safe oil change. If you're unsure about the process or working beneath a raised vehicle, consider having a professional perform the service.
Summary
The 2015 Lexus GS models—primarily the GS 350 and GS 450h—use about 6.4 quarts (6.1 liters) of engine oil with a filter per full oil change. Use a 0W-20 full synthetic oil and follow the owner’s manual for service intervals. Always verify the exact capacity for your market and engine variant, and consult a qualified technician if you have any doubts.