🛢️ Como escolher os melhores óleos de motor: guia de compra completo

Motor Oils: Viscosity Ratings, Synthetic vs Conventional, and Engine Protection

Motor oil lubricates engine components, reduces friction, and protects against wear. Understanding oil specifications helps select appropriate motor oil for your vehicle.

Viscosity Explained

SAE ratings indicate flow characteristics.

5W-30, 0W-20, etc.

W = winter performance.

Second number = operating temperature viscosity.

Conventional Oil

Refined from crude oil.

Adequate for many vehicles.

Lower cost.

More frequent changes typically needed.

Synthetic Oil Benefits

Engineered molecular consistency.

Better temperature performance.

Extended drain intervals possible.

Higher cost justified for many uses.

Full Synthetic vs Blend

Full synthetic: all synthetic base.

Synthetic blend: mix with conventional.

Blend offers partial benefits at lower cost.

Full synthetic for maximum protection.

API and ILSAC Ratings

Certification of oil quality.

Current: API SP, ILSAC GF-6.

Backward compatible.

Look for current ratings.

Manufacturer Specifications

Check owner's manual requirements.

BMW, Mercedes, VW have specific specs.

Using wrong oil can void warranty.

Match manufacturer requirements.

Climate Considerations

Cold climates: lower W number.

Hot climates: appropriate operating viscosity.

Multi-grade oils cover range.

Match to your typical conditions.

Change Intervals

Conventional: 3,000-5,000 miles typical.

Synthetic: 7,500-15,000 miles possible.

Follow manufacturer recommendations.

Severe driving shortens intervals.

High-Mileage Oils

Formulated for older engines.

Seal conditioners reduce leaks.

75,000+ mile engines.

May extend engine life.

Brand Considerations

Major brands (Mobil 1, Castrol, Pennzoil, Valvoline).

Quality largely consistent among majors.

Meeting specifications matters most.

Don't overpay for brand.

DIY vs Shop Changes

DIY saves money.

Proper disposal required.

Shop convenient for many.

Oil change places use adequate products.

Practical Recommendations

For most modern vehicles, manufacturer-specified viscosity in quality synthetic ($25-40 for 5 qts).

Check owner's manual for required specifications before purchasing.

High-mileage formulas for older engines with 75,000+ miles.

Don't exceed recommended change intervals regardless of oil type.

Frequently Asked Questions

O que devo procurar ao comprar óleos de motor?

Os principais fatores incluem qualidade de construção, avaliações de usuários e custo-benefício. Opções de classificação mais alta, como o Mobil 1 Mobil 1 High Quilometral Oil Synthetic Motor Oil 5W-2 (4,8★ de 50.187 avaliações) demonstram como é a qualidade nesta categoria.

Quanto custam normalmente os óleos de motor?

Os preços variam de US$ 6 a US$ 34, com a maioria das opções de qualidade em torno de US$ 24. As opções de orçamento abaixo de US$10 funcionam para uso ocasional, enquanto os modelos premium acima de US$36 oferecem melhor durabilidade e recursos.

Quais óleos de motor são mais populares agora?

O Mobil 1 High Quilometragem Full Synthetic Motor Oil 5W-20 é atualmente mais bem avaliado com 4,8★ de 50.187 avaliações verificadas. Verifique nossa comparação completa em /best/motor-oils para todas as principais opções.