Can I use 10w30 in a Subaru Impreza?

Using 10w30 in a Subaru Impreza
When considering the use of 10w30 oil in a Subaru Impreza, it’s important to note that the choice of oil viscosity can have an impact on the engine’s performance and longevity. Here’s what the search results reveal:
Subaru’s Recommendation: According to a response on a forum dedicated to Subaru Impreza GC8 and RS owners and enthusiasts, it’s mentioned that both 5W-30 and 10W-30 can be used in most temperature ranges, and 10W-30 is acceptable for use in a Subaru Impreza, especially in warmer climates like California.
Oil Viscosity and Engine Performance: The same source also mentions that a switch from 5W-30 to 10W-30 did not result in any noticeable difference in power or acceleration, indicating that the use of 10W-30 did not adversely affect the engine’s performance.
Manufacturer’s Oil Usage: Another user mentioned that Subaru dealerships have been using 10W-30 oil in Subaru Imprezas, even in relatively cold climates, which suggests that the use of 10W-30 is supported by the manufacturer.
Subaru’s Oil Recommendations: A response from a different source indicates that 5W-30 can always be used instead of 10W-30, as both are the same viscosity grade at operating temperature, where the engine spends most of its running time. The 5W-30 will flow better for cold starts, but 10W-30 is also acceptable.
In conclusion, based on the information available, it appears that using 10W-30 oil in a Subaru Impreza is acceptable, especially in warmer climates. However, it’s always advisable to consult the owner’s manual or a certified mechanic for specific recommendations based on the vehicle’s age, condition, and usage patterns.

Is it OK to use 10w30 instead of 5w30?

A common question is whether it’s safe to use 10W-30 instead of 5W-30 oil, for example. While it’s best to use what’s recommended in your owner’s manual, inadvertently using a viscosity one grade higher or lower than what’s recommended generally poses no long-term harm.

What happens if you put 10w30 in a 5w30 car?

You can use 10w30 instead of 5w30 as long as the vehicle isn’t subjected to cold temperatures for an extended period of time. You want the oil to be pumped throughout the engine as quickly as possible after starting the engine to prevent “cold start damage”.

Can I use 10W instead of 0W?

The first number of a multi-grade oil designates the ability for the oil to be pumped and flow at colder temperatures; the “W” stands for winter. Thus, a 0W oil will be able to flow faster and get to critical engine components better than a 5W or a 10W oil; especially in extreme cold conditions and at engine start-up.

Do Subarus require special oil?

Naturally aspirated engines in the newest Forester, Impreza, Legacy, Outback, and BRZ models as well as turbocharged models require Subaru Synthetic Motor Oil (or its equivalent).

Can I mix a little 10w30 with 5w30?

Yes, it is perfectly safe for you to mix 5W-30 and 10W-30 engine oils. Thanks to their close viscosity, mixing the two oils will have no damaging effect on the engine. It’s worth remembering that 10W-30 has more density than 5W-30, so make sure you pour an appropriate amount when mixing.

What happens if I mix 10w30 and 0w20?

An oil too thick can cause issues getting oil pressure at various solenoids and oil pressure switches. Not really something to chance. Exactly, the valve train components in these engines are very sensitive to oil viscosity. Too thick an oil could cause long term problems.

Which engine oil is best for Subaru?

For engines that aren’t turbo-charged, 0W-20 synthetic oil is your best Subaru Outback oil type. For older Subaru Outback models, the engine will thrive with a higher viscosity, so if your Outback has seen some miles and years, you can choose 5W-30 synthetic oil.

Can I use 10w30 instead of 0w30?

Yes, you can use 10W-30 in winter, but it might not provide as effective cold-start protection as 0W-30.

What oil is best for Subaru Impreza?

Subaru Oil Guide:

Model	Subaru Oil Required	Capacity
Subaru Impreza 2002 – 2011	5W-30 Conventional Oil	4.4 Quarts
Subaru Impreza 2012 – 2021	0W-20 Synthetic Oil	4.7 – 5.3 Quarts
Subaru Legacy & Outback 2002 – 2012	5W-30 Conventional Oil	4.4 Quarts
Subaru Legacy & Outback 2013 – 2021	0W-20 Synthetic Oil	4.4 – 5.1 Quarts

What is 10W30 vs 5W30 vs 0w30?

The 0W30 oil is thinner at colder temperatures than 5W30. The 5W30 oil is thinner at colder temperatures than 10W30 oil. All three motor oils act about the same at hot temperatures because they are all 30 weight oils when hot. W means winter.